CN114876951B

CN114876951B - Cylindrical roller bearing and assembly method thereof

Info

Publication number: CN114876951B
Application number: CN202210626161.6A
Authority: CN
Inventors: 刘延斌; 黄杰; 桑得雨
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2022-06-02
Filing date: 2022-06-02
Publication date: 2023-07-21
Anticipated expiration: 2042-06-02
Also published as: CN114876951A

Abstract

The invention belongs to the field of bearings, and particularly relates to a cylindrical roller bearing and an assembly method of the cylindrical roller bearing, wherein rollers are arranged between an inner ring and an outer ring of the cylindrical roller bearing, cylindrical isolation bars with diameters smaller than the diameters of the rollers are arranged between two adjacent rollers so as to separate the two adjacent rollers, the cylindrical roller bearing further comprises a tightening ring group, the tightening ring group comprises a first tightening ring and a second tightening ring, the rollers are provided with roller tightening ring matching ring grooves, the first tightening ring sequentially bypasses the rollers and the isolation bars from inside to outside, the second tightening ring is arranged at intervals with the first tightening ring along the axial direction of the rollers, and sequentially bypasses the rollers and the isolation bars from inside to outside along the direction opposite to the direction of the first tightening ring so as to clamp the rollers and the isolation bars between the first tightening ring and the second tightening ring, the cross section size of the roller tightening ring matching ring along the axial direction of the rollers is equal to or larger than the cross section size of the tightening ring group, and the tightening ring tightly tightens the rollers on the inner ring, thereby effectively reducing or even avoiding the generation of sliding friction.

Description

Cylindrical roller bearing and assembly method thereof

Technical Field

The invention belongs to the field of bearings, and particularly relates to a cylindrical roller bearing and an assembly method of the cylindrical roller bearing.

Background

The rollers of the cylindrical roller bearing are cylindrical and are in linear contact with the inner ring and the outer ring of the bearing, so that the cylindrical roller bearing has excellent radial load bearing capacity, and the cylindrical roller bearing is a key component commonly used in machinery with a slewing mechanism.

The cylindrical roller bearing comprises an outer ring, an inner ring, a retainer and a plurality of rolling bodies, wherein an annular rollaway nest is processed on the inner diameter surface of the outer ring, the rollaway nest is an outer rollaway nest, the outer diameter surface of the inner ring forms an inner rollaway nest, and the retainer is used for retaining the positions of the rolling bodies and preventing contact friction among the rolling bodies. Such cylindrical roller bearings are conventional cylindrical roller bearings, and although having a good radial bearing capacity, sliding friction with a large slip ratio is usually generated between the rollers and the raceways, between the rollers and the cage, and between the cage and the cage ring, which is extremely liable to cause premature wear failure of the bearing, and which consumes a large amount of energy, directly affecting the working performance and reliability of a host machine using the bearing.

Therefore, there is a need for a cylindrical roller bearing with as little as possible, even no sliding friction, inside.

Disclosure of Invention

The invention aims to provide a cylindrical roller bearing, which solves the technical problems that the cylindrical roller bearing in the prior art is easy to wear and fail too early and has high energy consumption because of the fact that the inside of the cylindrical roller bearing is easy to generate large sliding friction; the invention also aims to provide an assembly method of the cylindrical roller bearing.

In order to achieve the above purpose, the technical scheme of the cylindrical roller bearing provided by the invention is as follows:

the utility model provides a cylindrical roller bearing, includes inner circle, outer lane and a plurality of cylindrical roller, and the outer lane inboard has interior raceway, and the inner circle outside has outer raceway, and the roller setting is between outer lane and inner circle and with outer raceway and interior raceway cooperation, is provided with the diameter between two adjacent rollers and is less than the cylindrical spacer bar of roller diameter, and spacer bar and two adjacent rollers rolling contact cooperation in order to separate two adjacent rollers, cylindrical roller bearing still includes hoop group, hoop group includes first hoop and second hoop, has seted up on the outer peripheral face of each roller with hoop group complex hoop cooperation annular, first hoop in-out alternation is around each roller and spacer bar in proper order, second hoop along roller axial and first hoop interval arrangement to around each roller and spacer bar in proper order along the opposite direction with first hoop, in order with each roller and spacer bar clamp between first hoop and second hoop, the cross-sectional dimension of hoop cooperation annular along the roller axial equals or is greater than hoop group's cross-section size.

The beneficial effects are that: the spacer is arranged to separate two adjacent rollers, the rollers are tightly clamped on the inner ring by the clamping ring group, the clamping rings are positioned in the roller clamping ring matching ring grooves and cannot be rolled, when the bearing rotates, although centrifugal force can enable the rollers to generate a trend of keeping away from the inner roller path, under the clamping constraint effect of the clamping ring group, the rollers can be kept in a designed distributed circle and cannot generate movement of keeping away from the inner roller path, so that the rollers cling to the inner roller path, the phenomenon that the rollers and the inner roller path slide is prevented from occurring due to contact force reduction, meanwhile, the clamping rings keep the spacer in position, meanwhile, the spacer is driven to generate forward rotation with the rollers through friction force, and further sliding friction generated between the rollers and the spacer is reduced, even eliminated, so that the movement between the rollers and the spacer is almost pure rolling, the rollers cannot contact friction under the isolation of the spacer, the fact that the sliding friction inside the cylindrical roller bearing is extremely small or even no sliding friction is guaranteed, and further the cylindrical roller bearing cannot prematurely wear and lose efficacy is ensured, and the host using the cylindrical roller bearing is lower in energy consumption.

As a further improvement, the tightening ring groups are provided at both ends in the axial direction of the cylindrical roller bearing.

The beneficial effects are that: and a plurality of groups of tightening ring groups are arranged, so that the rollers can be more stably and reliably tightened on the inner ring.

As a further improvement, the tightening ring groups at the axial ends of the cylindrical roller bearing are symmetrically arranged with respect to a symmetry plane of the cylindrical roller bearing perpendicular to the axis.

The beneficial effects are that: the tightening ring groups at the two axial ends of the cylindrical roller bearing are symmetrically arranged, so that the stress of the roller is concentrated towards the inner ring, and the roller is more stably and reliably tightened on the inner ring.

As a further improvement, the roller tightening ring matching ring groove comprises a first roller ring groove and a second roller ring groove which are arranged at intervals along the axial direction of the roller, the first roller ring groove is matched with the first tightening ring, and the second roller ring groove is matched with the second tightening ring.

The beneficial effects are that: two annular grooves are processed respectively to form a roller tightening ring matching groove, and solid parts between the two annular grooves reliably isolate the first tightening ring and the second tightening ring, so that the two tightening rings can be prevented from contacting and wearing, and the durability of the cylindrical roller bearing is improved.

As a further improvement, the isolating rod is provided with an isolating rod clamping ring matching annular groove matched with the clamping ring group, and the cross section size of the isolating rod clamping ring matching annular groove along the axial direction of the isolating rod is not smaller than the cross section size of the clamping ring group and is aligned with the roller clamping ring matching annular groove in the axial direction.

The beneficial effects are that: the annular groove matched with the tightening ring is also formed in the isolating rod, so that the bending amount of the tightening ring is reduced, the durability of the tightening ring is improved, and the durability of the cylindrical roller bearing is further improved.

As a further improvement, the spacer rod hooping ring matching ring groove comprises a first spacer rod ring groove and a second spacer rod ring groove which are arranged at intervals along the axial direction of the spacer rod, the first spacer rod ring groove is matched with the first hooping ring, and the second spacer rod ring groove is matched with the second hooping ring.

The beneficial effects are that: two annular grooves are processed respectively to form a spacer rod hooping ring matching groove, and solid parts between the two annular grooves reliably isolate the first hooping ring and the second hooping ring, so that the two hooping rings can be prevented from contacting and wearing, and the durability of the cylindrical roller bearing is improved.

As a further improvement, the axes of the rollers and the spacer bars are distributed on the same circle.

The beneficial effects are that: the axes of the rollers and the isolating rods are distributed on the same circle, so that the clamping ring set can maintain the isolating rods stably.

As a further improvement, the first and second hooping rings are fiber or rubber rings.

The beneficial effects are that: the hoop ring adopts fiber rings, so that the cylindrical roller bearing has good toughness. The rubber ring is adopted as the tightening ring, so that the tightening ring has good elastic tightening performance, and the cylindrical roller bearing can meet the use requirement of low rotation speed.

In order to achieve the above purpose, the technical scheme of the assembly method of the cylindrical roller bearing provided by the invention is as follows:

when the cylindrical roller bearing is assembled, the inner ring is used as a support, the tightening ring group, the roller and the isolating rod are plugged and wound to form a chain-shaped component, then the chain-shaped component is withdrawn from the inner ring, the chain-shaped component is radially contracted and deformed and then plugged into the outer ring, the chain-shaped component is unfolded to enable the roller to be matched with the outer raceway, and then the inner ring is plugged into a middle pore canal surrounded by the chain-shaped component.

The beneficial effects are that: during assembly, the inner ring is utilized as a support to carry out braiding and assembling of the tightening ring group, the roller and the isolating rod, so that the braiding and assembling operation is easy to carry out.

As a further improvement, at least one spacer is reserved when the tightening ring group is assembled with the roller and the spacer by caulking and winding, and the reserved spacer is inserted to a designed position after the completion of the assembly of the tightening ring group with the roller and the rest of spacers.

The beneficial effects are that: because the diameter of the isolating rod is relatively smaller, when the hooping ring, the roller and the isolating rod are subjected to plug assembling and braiding assembling, at least one isolating rod is reserved, so that the hooping force during the hooping ring, the roller and the isolating rod assembling can be reduced, and the smooth proceeding of the assembling operation is ensured.

Drawings

FIG. 1 is a schematic view showing the internal structure of a cylindrical roller bearing of the present invention in which an outer ring portion of example 1 is cut away;

FIG. 2 is a schematic view of the outer ring of example 1 of the cylindrical roller bearing of the present invention, partially cut away;

FIG. 3 is a schematic view showing the structure of an inner ring of an embodiment 1 of a cylindrical roller bearing according to the present invention;

FIG. 4 is a schematic view showing the structure of a roller of example 1 of a cylindrical roller bearing according to the present invention;

FIG. 5 is a schematic view showing the structure of a spacer rod according to example 1 of a cylindrical roller bearing of the present invention;

FIG. 6 is a schematic view showing the configuration of the first collar of the cylindrical roller bearing of example 1 of the present invention in cooperation with the rollers and spacer bars;

FIG. 7 is a schematic view showing the configuration of the second collar of example 1 of the cylindrical roller bearing of the present invention in cooperation with each roller and spacer.

1. An outer ring; 11. turning over the edge; 12. an outer race; 2. an inner ring; 21. an inner race; 3. a roller; 31. a first roller ring groove; 32. a second roller ring groove; 4. a spacer; 41. a first spacer ring groove; 42. a second spacer ring groove; 5. a first tightening ring; 6. and a second tightening ring.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.

It is noted that relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" or the like is not excluded from a process, method, or the like that includes the element.

In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.

In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.

The present invention is described in further detail below with reference to examples.

Specific embodiment 1 of a cylindrical roller bearing provided by the invention:

as shown in fig. 1, the spacer comprises an outer ring 1, an inner ring 2, rollers 3, spacer bars 4 and a tightening ring group comprising a first tightening ring 5 and a second tightening ring 6.

As shown in fig. 2, the outer ring 1 has a part of structure, the outer ring 1 is annular, both axial ends of the outer ring are provided with turning edges 11 which are turned inwards along the radial direction, and the part of the outer ring 1 between the two turning edges 11 forms an outer raceway 12 which is matched with the roller 3. As shown in fig. 3, the inner ring 2 has a cylindrical shape, and an outer peripheral surface thereof forms an inner race 21 that is fitted to the rollers 3.

As shown in fig. 4, the roller 3 is cylindrical, two axial ends of the roller 3 are provided with roller tightening ring matching ring grooves, specifically, each roller tightening ring matching ring groove comprises two ring grooves, namely a first roller ring groove 31 and a second roller ring groove 32, which are arranged at intervals along the axial direction of the roller 3 and are respectively used for matching with the two tightening rings, and a solid part between the first roller ring groove 31 and the second roller ring groove 32 separates the first tightening ring 5 and the second tightening ring 6 to prevent the two tightening rings from contacting and rubbing. The cross-sectional area of each roller ring groove along the axial direction of the roller 3 is larger than the cross-sectional area of the corresponding tightening ring.

As shown in fig. 1 and 5, the spacer 4 is also cylindrical with a smaller diameter than the roller 3. Like the roller 3, spacer rod 4 has offered spacer rod hooping ring cooperation annular at axial both ends, and specifically spacer rod hooping ring cooperation annular includes two annular, is first spacer rod annular 41 and second spacer rod annular 42 respectively, and two spacer rod annular are arranged along spacer rod 4's axial interval, are used for respectively with two hooping ring cooperation. The first spacer ring groove 41 and the second spacer ring groove 42 are aligned with the first roller ring groove 31 and the second roller ring groove 32, respectively, in the axial direction of the cylindrical roller bearing. The solid portion between the first spacer ring groove 41 and the second spacer ring groove 42 blocks the first clamping ring 5 and the second clamping ring 6, preventing the two clamping rings from touching and rubbing. The sectional area of each spacer rod ring groove along the axial direction of the spacer rod 4 is larger than the sectional area of the corresponding tightening ring.

When the assembly is carried out, one isolating rod 4 is reserved, all rollers 3 and other isolating rods 4 are assembled by taking an inner ring 2 as an inner liner, specifically, a tightening ring is sleeved on the outer side of the inner ring 2, positions are kept by hand, the rollers 3 and the other isolating rods 4 are plugged, after the assembly of the tightening ring and the rollers 3 and the other isolating rods 4 is completed, the reserved isolating rods 4 are plugged at positions corresponding to the plug devices of the isolating rods 4, as one isolating rod 4 is reserved before the assembly, the tightening force of the tightening ring is not too large in the whole assembly process, the assembly work of the tightening ring and the rollers 3 and the isolating rods 4 is ensured to be smoothly carried out, after the assembly of the reserved isolating rods 4 to the corresponding positions is completed, the tightening ring group is in a tightening state to tighten the rollers 3 on the inner ring 2, then chain-shaped components formed by the rollers 3, the isolating rods 4 and the tightening ring group are disassembled from the inner ring 2, so that the chain-shaped components shrink and deform radially to be plugged into the outer rollaway paths of the outer ring 1, and then the chain-shaped components are radially completed to form the middle-shaped chain-shaped components of the chain-shaped components and the inner ring-shaped components 2 are plugged.

Since the tightening ring elastically tightens the rollers, the entire chain assembly can be driven to radially expand when the inner ring 2 is mounted, so that the inner ring 2 can be fitted. After the assembly is completed, as shown in fig. 6, the first hooping ring 5 cooperates with the outer side of each roller 3 and cooperates with the inner side of each spacer rod 4, as shown in fig. 7, the second hooping ring 6 cooperates with the inner side of each roller 3 and cooperates with the outer side of each spacer rod 4, so that the hooping ring set clamps each roller 3 and spacer rod 4 between the hooping rings. In this embodiment, as shown in fig. 6 and 7, the axes of each spacer rod 4 and each roller 3 are distributed on the same distribution circle after the assembly is completed. And, as shown in fig. 1, after the assembly is completed, the positions and winding modes of the tightening ring groups at the two ends of the cylindrical roller bearing satisfy the following conditions: the tightening ring groups at the two ends of the cylindrical roller bearing are symmetrical relative to the symmetry plane of the cylindrical roller bearing, which is perpendicular to the axis.

When the cylindrical roller bearing rotates at a high speed, the roller 3 can generate a trend of being far away from the inner raceway due to the action of centrifugal force, but the roller 3 can be kept in an original distribution circle due to the tightening constraint action of the tightening ring group on the roller 3, and the movement of being far away from the inner raceway can not be generated, so that the roller 3 is tightly attached to the inner raceway, the contact force is prevented from being reduced, and slipping is further effectively prevented from being generated between the roller and the inner raceway. Meanwhile, the roller 3 drives the tightening belt to act, and the tightening belt drives the isolating rod 4 to rotate forward with the roller 3 through friction force, so that sliding friction between the roller 3 and the isolating rod 4 can be effectively reduced and even eliminated, and the motion between the roller 3 and the isolating rod 4 is close to pure rolling. In addition, sliding friction is not generated between the rollers 3 due to the spacing action of the spacer bars 4.

The winding motion of the hooping ring between the rollers 3 and the isolating rods 4 and the rotation of all the rollers 3 and the isolating rods 4 keep forward, and the weight of the hooping ring is very small, so that large sliding friction is not generated between the hooping ring and all the rollers 3 and the isolating rods 4, the driving efficiency of the rollers 3 and the isolating rods 4 can be improved through the motion between the friction force transmission rollers 3 and between the rollers 3 and the isolating rods 4, and the energy consumption is further reduced, so that the sliding friction between the rollers 3 and the rollaway nest inside the cylindrical roller bearing and between the rollers 3 and the isolating rods 4 can be effectively reduced, the energy consumption and the abrasion inside the cylindrical roller bearing are greatly reduced, in this process, the main transmission is realized through the contact cooperation of the rollers 3 and the isolating rods 4, and the part of the transmission effect of the hooping ring can effectively reduce or even eliminate the sliding friction between the rollers and the isolating rods. And, since the retainer is removed, vibration and noise generated by the collision and friction of the retainer are thoroughly removed. The cylindrical roller bearing can be widely applied to high, medium and low-speed rotary machinery.

For the material of the tightening ring, the tightening ring can be made of super-strong polyethylene fiber, namely Dyneema, or polyarylate fiber, namely Vectran, so that the tightening ring has reliable toughness strength and can be tensioned to provide tightening force after the roller 3 and the isolating rod 4 are braided and assembled. Of course, the tightening ring can also be a rubber ring, so that the tightening ring has good tightening capability, and the cylindrical roller bearing can be applied to a rotating mechanism with low rotation speed requirement.

It should be noted here that the description of the cylindrical shape of the rollers 3 and the spacers 4 is intended to emphasize that the outer circumferential surfaces of the rollers 3 and the spacers 4 are cylindrical surfaces, and that the inner structures of the rollers 3 and the spacers 4 are not involved, and that the rollers 3 and the spacers 4 may be hollow or solid in a more specific structure.

The specific embodiment 2 of the cylindrical roller bearing provided by the invention is mainly different from embodiment 1 in that: in embodiment 1, the tightening ring groups are provided at both ends in the axial direction of the cylindrical roller bearing. In this embodiment, the set of tightening rings is provided only in the middle of the cylindrical roller bearing.

The specific embodiment 3 of the cylindrical roller bearing provided by the invention is mainly different from embodiment 1 in that: in example 1, the hoop group consists of two hoops. In this embodiment, the tightening ring set includes three tightening rings, and winding directions of two adjacent tightening rings are opposite.

The specific embodiment 4 of the cylindrical roller bearing provided by the invention is mainly different from embodiment 1 in that: in example 1, the roller gripping ring mating ring groove and the spacer gripping ring mating ring groove consist of separate ring grooves. In this embodiment, the roller tightening ring matching ring groove and the spacer tightening ring matching ring groove are ring grooves with wider widths, the widths of which meet the requirement of being matched with the two tightening rings at the same time, and the two tightening rings can be arranged in the ring grooves at intervals along the axial direction of the cylindrical roller bearing.

The specific embodiment 5 of the cylindrical roller bearing provided by the invention is mainly different from embodiment 1 in that: in embodiment 1, two sets of tightening ring sets are provided at both ends in the axial direction of the cylindrical roller bearing. In this embodiment, four sets of tightening ring sets are disposed at two axial ends of the cylindrical roller bearing, and specifically two sets of tightening ring sets are disposed at each end. Of course, in other embodiments, more sets of gripping ring sets may be provided at both ends of the cylindrical roller bearing in the axial direction, such as six sets in total.

The invention provides a concrete embodiment of a cylindrical roller bearing assembly method, which comprises the following steps:

the assembly method of the cylindrical roller bearing provided by the invention is the same as that of the cylindrical roller bearing in each embodiment of the cylindrical roller, and will not be described herein.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The cylindrical roller bearing comprises an inner ring (2), an outer ring (1) and a plurality of cylindrical rollers (3), wherein an inner raceway (21) is arranged on the inner side of the outer ring (1), an outer raceway (12) is arranged on the outer side of the inner ring (2), the rollers (3) are arranged between the outer ring (1) and the inner ring (2) and are matched with the outer raceway (12) and the inner raceway (21), the cylindrical roller bearing is characterized in that a cylindrical isolating rod (4) with the diameter smaller than that of the rollers is arranged between two adjacent rollers (3), the isolating rod (4) is in rolling contact with the two adjacent rollers (3) so as to separate the two adjacent rollers (3), the cylindrical roller bearing further comprises a hooping ring group, the hooping ring group comprises a first hooping ring (5) and a second hooping ring (6), the outer circumferential surface of each roller (3) is provided with a hooping ring matching ring groove matched with the hooping ring group, the first hooping ring (5) and the isolating rod (4) are sequentially wound around each roller (3) and the isolating rod (4) in sequence, the second hooping ring (6) is axially arranged with the first hooping ring (5) and the second hooping ring (4) are sequentially wound around the isolating rod (4) in the opposite directions between the first hooping ring (4) and the second hooping ring (5) and the isolating rod (4) respectively, the cross-sectional dimension of the roller tightening ring matching ring groove along the axial direction of the roller (3) is equal to or larger than the cross-sectional dimension of the tightening ring group.

2. The cylindrical roller bearing according to claim 1, wherein the tightening ring group is provided at both ends in an axial direction of the cylindrical roller bearing.

3. The cylindrical roller bearing according to claim 2, wherein the sets of gripping rings at both axial ends of the cylindrical roller bearing are symmetrically arranged with respect to a symmetry plane of the cylindrical roller bearing perpendicular to the axis.

4. The cylindrical roller bearing according to claim 1, wherein the roller tightening ring matching ring groove comprises a first roller ring groove and a second roller ring groove which are arranged at intervals along the axial direction of the roller (3), the first roller ring groove is matched with the first tightening ring (5), and the second roller ring groove is matched with the second tightening ring (6).

5. The cylindrical roller bearing according to any one of claims 1 to 4, wherein the spacer rod (4) is provided with a tightening ring fitting ring groove fitted with the tightening ring group, and the spacer rod tightening ring fitting ring groove is not smaller than the tightening ring group in cross section along the axial direction of the spacer rod (4) in size and is disposed in alignment with the roller tightening ring fitting ring groove in the axial direction.

6. The cylindrical roller bearing according to claim 5, wherein the spacer rod tightening ring matching ring groove comprises a first spacer rod ring groove and a second spacer rod ring groove which are arranged at intervals along the axial direction of the spacer rod (4), the first spacer rod ring groove is matched with the first tightening ring (5), and the second spacer rod ring groove is matched with the second tightening ring (6).

7. Cylindrical roller bearing according to any of claims 1-4, characterized in that the axes of the rollers (3) and the spacer bars (4) are distributed on the same circle.

8. The cylindrical roller bearing according to any one of claims 1 to 4, wherein the first and second hooping rings are fiber rings or rubber rings.

9. A method for assembling a cylindrical roller bearing according to any one of claims 1 to 8, characterized in that the inner ring (2) is used as a support, the tightening ring group, the rollers (3) and the isolating rods (4) are plugged and wound to form a chain-shaped assembly, then the chain-shaped assembly is withdrawn from the inner ring (2), the chain-shaped assembly is radially contracted and deformed and plugged into the outer ring (1), the chain-shaped assembly is unfolded to enable the rollers (3) to be matched with the outer roller path (12), and then the inner ring (2) is plugged into a middle duct surrounded by the chain-shaped assembly.

10. The method for assembling a cylindrical roller bearing according to claim 9, wherein at least one spacer rod (4) is reserved when the tightening ring group is assembled by caulking and winding with the roller (3) and the spacer rod (4), and the reserved spacer rod (4) is inserted into a designed position after the completion of the assembling of the tightening ring group with the roller (3) and the remaining spacer rods (4).