CN215481980U

CN215481980U - Eccentric composite buffer sleeve structure

Info

Publication number: CN215481980U
Application number: CN202121738881.9U
Authority: CN
Inventors: 曹钢; 马红超
Original assignee: Wuhan Kunneng Track System Technology Co ltd
Current assignee: Wuhan Kunneng Track System Technology Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-01-11
Anticipated expiration: 2031-07-28

Abstract

The utility model discloses an eccentric composite buffer sleeve structure, which belongs to the field of fastener systems, and forms an integrally stressed eccentric composite buffer sleeve structure by matching an inner bushing and an outer bushing and combining eccentric arrangement of an installation hole in the outer bushing in a first direction, so that the installation and arrangement of the fastener system are accurately realized, the track gauge adjusting capacity of the fastener system is increased, and the fastener system is ensured not to generate longitudinal displacement during track gauge adjustment. The eccentric composite buffer sleeve structure is simple in structure and convenient to set, can ensure that the fastener system has certain distance adjusting capacity while realizing reliable setting of the fastener system, effectively avoids displacement of the fastener system in the longitudinal direction during distance adjusting operation of the fastener system, ensures the setting accuracy and reliability of the fastener system after the distance adjusting operation, improves the operation safety and stability of a track system, and has good application prospect and popularization value.

Description

Eccentric composite buffer sleeve structure

Technical Field

The utility model belongs to the field of fastener systems, and particularly relates to an eccentric composite buffer sleeve structure.

Background

Along with the rapid development of high-speed railways and heavy haul railways, the transverse load of trains is larger and larger, higher requirements are put forward on fastener systems in the rail transit, and the fastener systems are required to bear larger transverse load and have larger track gauge adjustment amount. However, the excessive transverse force is very likely to cause the anchor bolt of the fastener to be sheared and damaged by impact, especially in a turnout track system, the fastener belongs to a variable cross-section track system due to the rail-to-rail function, the fastener not only requires larger transverse bearing capacity and rail gauge adjustment amount, but also requires no longitudinal displacement along the rail in the distance adjustment process, otherwise, the cross section of the fastener is inconsistent with the designed cross section, and dangers such as train turnout-crossing and overturning are likely to be caused.

Often adopt rubber metal sleeve to carry out the transition buffering in traditional switch railway scheme, nevertheless have the easy tired damaged risk of rubber sleeve in the practical application in-process, simultaneously because rubber material and sleeve pipe height set up unreasonablely, lead to under the iron tie plate elasticity backing plate can not full play, when it has the roll adjustment requirement moreover, need dismantle the change with whole sleeve pipe, it is big to maintain work load, material cost is high. Adopt circular rubber eccentric bushing to compromise roll adjustment and cushioning effect among some schemes, but it is short except that rubber life-span, gauge keeping ability is relatively poor, and there are still problems such as along rail longitudinal displacement in the fastener system of roll adjustment in-process, not only is not suitable for switch track system, still can lead to the train stationarity relatively poor, will lead to the sleeper to damage easily when serious, influences driving safety.

SUMMERY OF THE UTILITY MODEL

Aiming at one or more of the defects or the improvement requirements in the prior art, the utility model provides an eccentric composite buffer sleeve structure, which can avoid the longitudinal displacement of a fastener system while realizing the distance adjustment requirement of the fastener system, meet the distance adjustment requirement of a fastener of a turnout track system and improve the stability of a train.

In order to achieve the above object, the present invention provides an eccentric composite cushion collar structure, which comprises an outer bushing and an inner bushing;

the outer bushing comprises a bushing main body which is of a non-revolving body structure, the size of the bushing main body extends in a first direction and a second direction which are orthogonal to each other, and the size of the bushing main body in the first direction is not smaller than that in the second direction;

the outer bushing is provided with a mounting hole penetrating through two end faces, and the center of the mounting hole and the center of the outer bushing are eccentrically arranged in the first direction;

the inner bushing is embedded in the mounting hole and then forms an integral structure with the outer bushing, and a bolt mounting hole is formed in the middle of the inner bushing and used for being matched with the anchoring bolt.

As a further improvement of the utility model, the outer bushing is made of composite material, and the inner bushing is made of metal material.

As a further improvement of the utility model, at least one limiting boss is arranged on the inner peripheral wall surface at the bottom of the mounting hole, and a limiting groove is arranged at the bottom of the inner bushing corresponding to the limiting boss, so that the limiting boss can be embedded into the corresponding limiting groove after the inner bushing and the outer bushing are correspondingly matched.

As a further improvement of the utility model, the size of the bushing main body along the axis of the mounting hole is not more than the sum of the thicknesses of the iron base plate and the elastic base plate arranged below the iron base plate.

As a further improvement of the utility model, the cross section of the bushing main body is square, oval or kidney-shaped.

As a further improvement of the utility model, the top periphery of the bushing main body is provided with a top convex plate which is used for abutting against the top surface of the iron base plate and closing the eccentric sleeve mounting groove when the bushing main body is embedded in the eccentric sleeve mounting groove of the iron base plate.

As a further improvement of the utility model, the top outer periphery of the inner bushing is provided with a ring platform structure in a protruding mode; correspondingly, the top of the mounting hole is annularly provided with a ring groove, so that the ring platform structure can be correspondingly embedded into the ring groove after the inner and outer bushings are correspondingly embedded.

As a further improvement of the utility model, a plurality of gauge marks are arranged on the top surface of the top convex plate at intervals along the circumferential direction.

As a further development of the utility model, the axis of the mounting hole is in the same vertical plane in the first direction as the centre line of the bushing body, so that the distance of the mounting hole axis from both sides of the bushing body is equal in the second direction.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the technical scheme conceived by the utility model has the following beneficial effects:

(1) according to the eccentric composite buffer sleeve structure, the inner bushing and the outer bushing are combined to form an integrally stressed eccentric composite buffer sleeve structure, the optimal arrangement of the structural form of the outer bushing is utilized, and the eccentric arrangement of the mounting hole in the outer bushing in the first direction is combined, so that the installation and the arrangement of a fastener system can be accurately realized, the fastener system is ensured to have certain track gauge adjusting capacity under the condition that the eccentric bushing is not required to be replaced, the longitudinal displacement of the fastener system is avoided during the track gauge adjustment, the accuracy, the reliability and the safety of the fastener system during the adjustment and the arrangement are ensured, and the workload of later maintenance is reduced.

(2) According to the eccentric composite buffer sleeve structure, the limiting boss is arranged at the bottom of the mounting hole of the outer bushing, and the limiting groove is formed at the bottom of the inner bushing, so that the limiting boss and the limiting groove can realize limiting after the inner bushing and the outer bushing are correspondingly matched, the inner bushing is prevented from rotating relative to the outer bushing when being used, and the setting, using reliability and safety of a fastener system are ensured; and set up the top flange through the bush main part top at the outer bush for after the outer bush correspondence was inlayed and is located the iron tie plate, the top flange can correspond the top surface of butt iron tie plate, and seals the eccentric sleeve mounting groove on the iron tie plate, avoids during debris got into the eccentric sleeve mounting groove with this, guarantees reliability and the stability that the bush structure set up.

(3) According to the eccentric composite buffer sleeve structure, the stress area of the bolt is increased through the corresponding arrangement of the eccentric composite buffer sleeve, the height of the stress action point of the anchor bolt is reduced by utilizing the corresponding optimization of the thickness dimension of the eccentric composite buffer sleeve, the transverse bearing capacity of the anchor bolt is improved, the shearing damage of the anchor bolt is effectively avoided, the adaptive stability of a fastener system is ensured, and the service life of a fastener is prolonged.

(4) According to the eccentric composite buffer sleeve structure, the inner lining and the outer lining are preferably made of the materials of the inner lining and the outer lining, the outer lining is in contact with the iron base plate and is made of the composite material with certain flexibility, the inner lining is in contact with the anchoring bolt and is made of the metal material with better rigidity, and the composite buffer sleeve is enabled not to affect the track gauge holding capacity of a fastener on the premise that the transverse impact force transmitted by the buffer iron base plate is met through rigid-flexible combination of the materials of the inner lining and the outer lining, so that the anchoring bolt is prevented from being damaged by impact.

(5) The eccentric composite buffer sleeve structure is simple in structure and convenient to set, can increase the distance adjusting capacity of the fastener system while realizing reliable setting of the fastener system, effectively avoids displacement of the fastener system in the longitudinal direction during distance adjusting operation of the fastener system, ensures the setting accuracy and reliability of the fastener system after the distance adjusting operation, improves the operation safety and stability of a track system, and has good application prospect and popularization value.

Drawings

FIG. 1 is a schematic view of the overall structure of an eccentric composite damping sleeve structure according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an outer bushing structure of an eccentric composite damping sleeve structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of an inner bushing structure of an eccentric composite damping bushing structure according to an embodiment of the present invention;

FIG. 4 is a sectional view showing the structure of an eccentric composite damping bushing according to an embodiment of the present invention;

FIG. 5 is a schematic view of the main portion of the outer liner of the eccentric composite damping sleeve structure according to an embodiment of the present invention;

FIG. 6 is a bottom view of the outer bushing structure of the eccentric composite damping sleeve structure in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an iron backing plate configured to match the structure of the eccentric composite buffer sleeve according to an embodiment of the present invention;

FIGS. 8 to 10 are schematic structural views illustrating normal use and distance adjustment of an eccentric composite damping sleeve structure according to an embodiment of the present invention;

in all the figures, the same reference numerals denote the same features, in particular:

4. an eccentric composite buffer sleeve; 401. an inner liner; 402. an outer liner; 4011. a limiting groove; 4012. a bolt mounting hole; 4021. a bushing body; 4022. a top convex plate; 4023. a limiting boss; 4024. marking a track gauge;

5. an iron backing plate; 501. a rail bearing portion; 502. an eccentric sleeve mounting groove; 503. track gauge arrows; 504. a shoulder block; 505. spring bar mounting groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1 to 6, the eccentric composite damping sleeve 4 according to the preferred embodiment of the present invention includes an inner sleeve 401 and an outer sleeve 402, which are disposed in a matching manner, and the outer sleeve 402 is eccentrically disposed with a mounting hole for correspondingly mounting the inner sleeve 401. The adjustment of the track gauge of the fastener system can be correspondingly realized by correspondingly changing the installation form of the eccentric composite buffer sleeve 4 on the iron base plate 5.

Specifically, the outer bushing 402 in the preferred embodiment includes a bushing body 4021 in a block-like configuration, preferably square in cross-section (end face perpendicular to the axis of the mounting hole), such as the rectangular configuration shown in FIG. 5. Meanwhile, the dimensions of the bushing body 4021 extend in two orthogonal directions (noted as a first direction and a second direction), which for the rectangular configuration described above are the length direction and the width direction of the bushing body 4021, respectively.

However, it will be appreciated that the bushing body 4021 may be provided in other forms, such as an oval-shaped structure or a kidney-shaped structure, in addition to the square-shaped structure described above. For an elliptical configuration, the first direction is the major axis direction and the second direction is the minor axis direction. For a kidney-shaped structure, the first direction is the length direction and the second direction is the width direction.

Further, with respect to the mounting holes that open into the bushing body 4021 in the preferred embodiment, the axes are located off-center from the centerline of the bushing body 4021 such that the axes of the mounting holes are at different distances from the edge of the bushing body 4021 in the first direction and the axes of the mounting holes are at the same distance from the edge of the bushing body 4021 in the second direction.

Taking the case shown in fig. 5 as an example, in this case, the mounting hole is eccentrically disposed in the first direction such that the center a of the mounting hole is spaced from the center B of the bushing body 4021 by a distance c in the first direction (the longitudinal direction), that is, the distance between the center of the mounting hole and the two side edges of the bushing body 4021 in the first direction is unequal, and the two distance values are a and a +2c in fig. 5, respectively. At this time, in the second direction (width direction), the distance between the center of the mounting hole and the center of the bush main body 4021 is zero, and two distance values are b in fig. 5.

In the above preferred embodiment, the mounting hole is eccentrically disposed in the first direction. It is clear that this is not the only arrangement of mounting holes, but that in other preferred embodiments the mounting holes may also be arranged eccentrically only in the second direction.

Further, for the square bushing body 4021 shown in the preferred embodiment, in order to facilitate its insertion into the iron shim plate 5 in the fastener system, it is preferable to provide its side corners in a rounded form, thereby achieving quick insertion of the bushing body 4021. Meanwhile, in order to realize reliable and accurate embedding of the bushing main body 4021, the iron backing plate 5 is provided with corresponding eccentric bushing installation grooves 502, the eccentric bushing installation grooves 502 at least can meet the embedding requirements when the outer bushing 402 is parallel to the longitudinal direction and the first direction in the first direction and is parallel to the transverse direction (namely, the eccentric composite buffer sleeve 4 is arranged along the longitudinal direction and the transverse direction of the rail), after the outer bushing 402 is correspondingly embedded, the outer bushing cannot rotate in the eccentric bushing installation grooves 502, only the outer bushing can rotate for a certain angle after being taken out and then is embedded, and the central position of the eccentric bushing installation grooves 502 is always unchanged in the rail gauge adjusting process, so that the longitudinal displacement can be prevented in the fastener system distance adjusting process.

In more detail, for the eccentric bushing installation groove 502 in the preferred embodiment, the two square grooves are respectively formed in the first direction and the second direction and then overlapped, and the positions of the two square grooves corresponding to the axes of the installation holes are in the same horizontal vertical plane, so that when the position of the bushing main body 4021 is adjusted, the whole fastener system does not longitudinally displace.

From the foregoing, it can be seen that the bushing body 4021 in the preferred embodiment is not longitudinally displaced by the fastener system during gauge adjustment, but the most essential reason is that the bushing body 4021 is not rotatable in the eccentric bushing mounting groove 502, i.e., the bushing body 4021 is a non-rotating body structure. Meanwhile, the opening form of the eccentric sleeve mounting groove 502 on the iron backing plate 5 is required to correspond to the structural form of the bushing main body 4021, so that the bushing main body 4021 can be respectively embedded in the eccentric sleeve mounting groove 502 when arranged longitudinally along the rail or transversely along the rail, and the bushing main body 4021 is limited after being embedded.

Further, for the outer bushing 402 in the preferred embodiment, mounting holes penetrating through two end faces are formed for accommodating the inner bushing 401, and as shown in fig. 1 and 3, the inner bushing 401 in the preferred embodiment has a cylindrical structure, and a bolt mounting hole 4012 is coaxially formed in the middle for passing an anchor bolt.

In actual installation, the inner bushing 401 mainly contacts with the anchor bolt, and is preferably made of a metal material, so that the inner bushing has good rigidity, excessive abrasion of the eccentric bushing can be effectively prevented, and the track gauge holding capacity of the fastener system is improved. Accordingly, the outer bushing 402 is made of a composite material, has a certain flexibility, and is mainly in contact with the iron shim plate 5 for buffering the lateral impact force. The rigidity and flexibility of the inner bushing and the outer bushing are combined, so that the eccentric composite buffer sleeve does not affect the track gauge holding capacity of the fastener on the premise of meeting the requirement of buffering the transverse impact force transmitted by the iron base plate 5. In one embodiment, the outer liner 402 is selected from a glass fiber reinforced PA66 material.

Preferably, in order to avoid rotation of the inner bushing 401 after being disposed in the outer bushing 402, at least one limit boss 4023, for example, two oppositely disposed in fig. 6, is preferably disposed on the bottom inner circumferential wall surface of the mounting hole. Correspondingly, corresponding notches, namely limiting grooves 4011, are formed in the bottom surface of the inner bushing 401, so that after the inner bushing and the outer bushing are correspondingly matched, each limiting boss 4023 can be embedded into the corresponding limiting groove 4011, and the annular positioning of the inner bushing 401 is realized. Obviously, the stopper boss 4023 does not protrude from the inner peripheral wall surface of the bolt mounting hole 4012 after it is fitted into the stopper groove 4011.

Further preferably, a convex ring structure flush with the top surface is circumferentially arranged on the top outer periphery of the inner bushing 401, as shown in fig. 3, and correspondingly, a ring-shaped embedding groove is circumferentially arranged on the top inner peripheral wall surface of the mounting hole of the outer bushing 402, so that a stepped through hole structure is integrally formed for embedding of the convex ring structure, as shown in fig. 4.

Of course, in actual installation, the annular embedding groove may not be formed on the top surface of the outer bushing 402, so that the convex ring structure at the top of the inner bushing 401 can be abutted and limited on the top surface of the outer bushing 402, thereby facilitating the separation, replacement and installation of the inner bushing and the outer bushing. However, in actual use, the inner and outer bushings are bonded and fixed after being matched to form an eccentric composite cushion bushing structure, and in this case, the top surface of the inner bushing 401 is preferably flush with the top surface of the outer bushing 402.

On the other hand, in practical use, the iron backing plate 5 in the fastener system is preferably disposed to cooperate with the eccentric composite damping sleeve 4, as shown in fig. 7, and includes a rail portion 501 disposed in the middle, and a shoulder 504 and a spring bar installation groove 505 respectively disposed on both sides of the rail portion 501, and the two ends of the iron backing plate 5 are respectively provided with an eccentric sleeve installation groove 502, and the eccentric sleeve installation grooves 502 are formed in a manner as shown in fig. 7, and can be used for embedding the bushing main body 4021 in the longitudinal direction and the transverse direction of the rail, respectively. Because the bushing body 4021 in the preferred embodiment has a rectangular structure, the eccentric bushing mounting groove 502 is formed in a cross-shaped structure formed by splicing two rectangular grooves which are orthogonally arranged.

In order to ensure that the eccentric composite buffer sleeve 4 is matched with the rear eccentric sleeve mounting groove 502 to be sealed, a certain distance is respectively extended outwards on the periphery of the top of the outer bushing 402 to form a top convex plate 4022 structure, so that after the eccentric composite buffer sleeve 4 is correspondingly arranged on the iron base plate 5, the top convex plate 4022 can just abut against the top surface of the iron base plate 5 and seal the eccentric sleeve mounting groove 502, thereby avoiding sundries from falling into the eccentric sleeve mounting groove 502 and ensuring that related parts are not corroded and damaged. In a preferred embodiment, the top raised plate 4022 is configured as shown in fig. 2 in a "cross-shaped" configuration, and the length of the "cross-shaped" configuration in both the first and second directions is greater than the length of the bushing body 4021 in the first direction (the length of the bushing body 4021 in the first direction is not less than the length in the second direction) to ensure reliable closure of the eccentric bushing mounting slot 502.

Preferably, a gauge mark 4024 is correspondingly arranged on the top surface of the top convex plate 4022 to quickly display the set gauge size of the bushing main body 4021. Correspondingly, the gauge arrow 503 is correspondingly arranged on the top surface of the iron base plate 5, so that after the eccentric composite buffer sleeve 4 is correspondingly arranged, the gauge arrow 503 can be just aligned with the corresponding gauge mark 4024, as shown in fig. 8-10, and the identification of the setting state of the fastener system is quickly realized.

In the schematic diagrams shown in fig. 8 to 10, the fastener system is normally set, 5mm is adjusted leftwards and 5mm is adjusted rightwards, when the fastener system is normally set, the first direction of the outer bushing 402 is longitudinally set along the rail, at this time, the distance between the axis of the installation hole and the two lateral sides of the outer bushing 402 is equal, and the outer bushing 402 is not rotatable after being embedded. When the fastener system has the requirement of 5mm of left adjustment, the two eccentric composite buffer sleeves 4 are respectively taken out and then rotated by 90 degrees, so that the center B of the bushing is positioned on the left side of the center A of the mounting hole. Correspondingly, when the fastener system has a requirement of being adjusted to the right by 5mm, the specific implementation is similar to the above-mentioned manner, and is not described herein again.

It can be understood that the distance adjustment size of the eccentric composite buffer sleeve 4 in the preferred embodiment is not limited to the above-mentioned ± 5mm, and it can be changed to the corresponding size according to the actual requirement, and it is only necessary to change the eccentric distance on the outer bushing 402, for example, the eccentric distance is set to ± 1mm, ± 2mm, ± 3mm, ± 6mm, etc., and it can be optimized according to the specific requirement in the actual design, and each kind of eccentric composite buffer sleeve 4 can effectively avoid the displacement of the fastener system in the longitudinal direction when performing the distance adjustment.

In addition, when actually setting up, the bottom of outer bush 402 is inlayed and is established into the elastic backing plate of iron backing plate 5 below, and the height (the size along mounting hole axis direction) of bush main part 4021 preferably is not more than the sum of the thickness of iron backing plate 5 and elastic backing plate, and further preferred more than the sum of iron backing plate 5 and elastic backing plate thickness 1mm less, so, can avoid eccentric cover just with the top surface contact of sleeper (or cushion plate) when not receiving anchor bolt tightening moment to do benefit to the elasticity of full play iron backing plate lower elastic backing plate. Meanwhile, due to the corresponding arrangement of the eccentric composite buffer sleeve 4, the stress area of the bolt is increased (a fastener similar to an eccentric sleeve is not arranged, the stress surface of the bolt is a contact section with the iron base plate 5, the contact area is smaller), the stress action point height of the anchor bolt is reduced (the fastener similar to the eccentric sleeve is not arranged, the central point of the stress action of the bolt is the vertical central point of the contact surface of the iron base plate 5, and after the eccentric sleeve is arranged, the central point of the stress action is changed to the vertical central point of the inner bushing 401, so that the height of the stress action point is reduced), the transverse bearing capacity of the anchor bolt is improved, and the anchor bolt is prevented from being sheared and damaged.

The eccentric composite buffer sleeve structure is simple in structure and easy and convenient to set, can ensure that the fastener system has certain distance adjusting capacity while realizing reliable setting of the fastener system, effectively avoids displacement of the fastener system in the longitudinal direction during distance adjusting operation of the fastener system, ensures the setting accuracy and reliability of the fastener system after the distance adjusting operation, improves the operation safety and stability of a track system, and has good application prospect and popularization value.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the utility model, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. An eccentric composite buffer sleeve structure is characterized by comprising an outer bushing and an inner bushing;

2. The eccentric composite damping bushing structure according to claim 1, wherein the outer bushing is made of a composite material and the inner bushing is made of a metal material.

3. The eccentric composite cushion collar structure according to claim 1, wherein at least one limiting boss is provided on the inner peripheral wall surface of the bottom of the mounting hole, and a limiting groove is provided at the bottom of the inner bushing corresponding to the limiting boss, so that the limiting boss can be inserted into the corresponding limiting groove after the inner and outer bushings are correspondingly matched.

4. The eccentric composite cushion collar structure of claim 1, wherein the bushing body has a dimension along the mounting hole axis that is no greater than the sum of the thickness of the iron shim plate and the thickness of the elastic shim plate disposed below the iron shim plate.

5. The eccentric composite damping sleeve structure of claim 1, wherein the cross-section of the bushing body is square, oval, or kidney shaped.

6. The eccentric composite cushion collar structure according to claim 1, wherein a top protrusion plate is provided to protrude outward from the top outer circumference of the bushing main body, for abutting against the top surface of the iron shim plate and closing the eccentric bushing installation groove when the bushing main body is fitted in the eccentric bushing installation groove of the iron shim plate.

7. The eccentric composite damping bushing structure according to claim 1, wherein the top outer periphery of the inner bushing is provided with a ring platform structure in a protruding manner; correspondingly, the top of the mounting hole is annularly provided with a ring groove, so that the ring platform structure can be correspondingly embedded into the ring groove after the inner and outer bushings are correspondingly embedded.

8. The eccentric composite damping sleeve structure of claim 6, wherein a plurality of gauge marks are provided on the top surface of said top flange at circumferential intervals.

9. The eccentric composite damping bushing structure of any of claims 1-8, wherein the axis of the mounting hole is in the same vertical plane along the first direction as the centerline of the bushing body, such that the distance between the mounting hole axis and the two sides of the bushing body is equal in the second direction.