CN115285159A - Floor vibration damping structure and rail vehicle - Google Patents
Floor vibration damping structure and rail vehicle Download PDFInfo
- Publication number
- CN115285159A CN115285159A CN202211035809.9A CN202211035809A CN115285159A CN 115285159 A CN115285159 A CN 115285159A CN 202211035809 A CN202211035809 A CN 202211035809A CN 115285159 A CN115285159 A CN 115285159A
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- floor
- vibration damping
- wall
- holes
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/10—Floors
Abstract
The invention provides a floor vibration damping structure and a rail vehicle.A vibration damping body is provided with a plurality of through holes which are arranged at intervals along the extension direction of a floor, and the through holes are provided with a first inner wall and a second inner wall which are oppositely arranged along the extension direction of the vibration damping body; the first inner wall and the second inner wall are in a separated state and an abutting state, and the vibration damping body provides first elastic force for the floor in the separated state; when the vibration damping body is pressed and increased, the first inner wall and the second inner wall are in an abutting state, and the vibration damping body provides second elastic force for the floor; through carrying out the trompil design to the damping body, realize the low rigidity design of big rigidity elastomer, be favorable to reducing the noise in the car, and realize the variable rigidity design, be little rigidity damping support when the hole compression promptly, when bearing the great load in the external world or passenger beat impact load, first inner wall and second inner wall are at the butt, and the hole is closed, realize big rigidity support, avoid the too big floor of leading to the floor to destroy, satisfy horizontal support stability when improving damping efficiency.
Description
Technical Field
The invention relates to the technical field of vibration reduction of rail vehicles, in particular to a floor vibration reduction structure and a rail vehicle.
Background
The interior floor of the railway vehicle is arranged on the floor of the vehicle body through the elastic shock absorber, the elastic shock absorber can reduce the vibration of the vehicle body to be transmitted to the interior of the vehicle, and the lower the rigidity is, the higher the shock absorption efficiency is.
However, in the conventional rubber damper, in order to pursue low-rigidity design, a rubber elastomer with lower rigidity needs to be adopted, so that the tangential rigidity of rubber is low, and the requirement on the transverse stability of a vehicle cannot be met. In order to meet different rigidity requirements, the rubber vibration absorber needs to adjust the rigidity and the hardness according to different formulas, so that the cost is high, and therefore, a floor vibration absorber capable of meeting the high-efficiency vibration absorption requirement and guaranteeing the transverse support stability is lacked in the prior art.
Disclosure of Invention
The invention provides a floor vibration damping structure and a railway vehicle, which are used for solving the defect of insufficient transverse support stability caused by low rigidity of a rubber vibration damper in the prior art, realizing efficient vibration damping of the floor vibration damping structure and improving the transverse support stability of the vibration damper.
The invention provides a floor vibration damping structure, comprising:
the damping body is provided with a plurality of through holes arranged at intervals along the extension direction of the floor, and each through hole is provided with a first inner wall and a second inner wall which are oppositely arranged along the extension direction of the damping body;
the first inner wall and the second inner wall have a separated state and an abutting state;
in the separated state, the vibration damping body provides first elastic force for the floor;
under the abutting state, the vibration reduction body provides second elastic force for the floor;
wherein the second elastic force is greater than the first elastic force.
According to one embodiment of the invention, the vibration damping body is provided with a plurality of rows of first through holes and at least one row of second through holes along the extension direction of the vibration damping body, each row of the first through holes and each row of the second through holes are arranged along the extension direction of the floor, a row of the second through holes is arranged between every two adjacent rows of the first through holes, and each second through hole is arranged in a staggered manner with two adjacent first through holes along the extension direction of the floor.
According to one embodiment of the invention, the length of the second through hole is larger than the distance between two adjacent first through holes along the extending direction of the floor.
According to one embodiment of the invention, the distance between the first inner wall and the second inner wall is smaller than the length of the through hole along the extension direction of the floor.
According to an embodiment of the present invention, a distance between the first inner wall and the second inner wall gradually decreases from two sides of the through hole to a center of the through hole.
According to an embodiment of the invention, the first inner wall and the second inner wall are cambered surfaces that are convex towards each other.
According to one embodiment of the present invention, both side surfaces of the through hole connecting the first inner wall and the second inner wall are arc surfaces.
According to one embodiment of the invention, the side surface of the damping body is provided with an open slot, the axis of which is parallel to the axis of the through hole.
According to one embodiment of the invention, one end of the vibration damping body along the telescopic direction of the vibration damping body is provided with a first mounting seat used for connecting an interior floor, and the other end of the vibration damping body along the telescopic direction of the vibration damping body is provided with a second mounting seat used for connecting a vehicle body floor.
The invention also provides a railway vehicle which comprises the interior floor and the vehicle body floor, wherein the floor vibration damping structure is arranged between the interior floor and the vehicle body floor.
According to the floor vibration damping structure and the rail vehicle, the vibration damping body is provided with the through hole which is arranged along the extending direction of the floor, and the through hole is provided with the first inner wall and the second inner wall which are oppositely arranged along the telescopic direction of the vibration damping body; the first inner wall and the second inner wall have a separation state and an abutting state, and the vibration damping body provides first elastic force for the floor in the separation state; when the vibration damping body is pressed and increased, the first inner wall and the second inner wall are in an abutting state, and the vibration damping body provides second elastic force for the floor; the design of the holes on the vibration damping body is realized, the design of the large-rigidity elastomer with low rigidity is realized, the noise in a vehicle is favorably reduced, the design of variable rigidity is realized, namely, the vibration damping support with low rigidity is adopted when the holes are compressed, when the vibration damping support bears external large load or impact load caused by jumping of passengers, the first inner wall and the second inner wall are abutted, the holes are closed, the support with high rigidity is realized, and the floor damage caused by overlarge floor sinking amount is avoided; the low-frequency vibration damping device has the advantages that the low-frequency vibration damping performance is realized, the tangential rigidity is not reduced, the vibration damping efficiency is improved, the transverse support stability is met, and the tangential rigidity requirement of a vehicle curve road section is well met.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a floor vibration damping structure provided by the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of a floor vibration dampening structure provided by the present invention;
fig. 4 is a schematic structural diagram of a through hole provided by the present invention.
Reference numerals:
100. a vibration damping body; 200. a through hole; 210. a first inner wall; 220. a second inner wall; 300. an open slot; 400. a first mounting seat; 500. a second mounting seat; 510. and (7) mounting holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention may be understood as specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, 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 intervening media. 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.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Specific embodiments of the present invention are described below in conjunction with fig. 1-4:
the embodiment of the invention provides a floor vibration damping structure, which comprises a vibration damping body 100, wherein the vibration damping body 100 is arranged on a vehicle body floor, an interior floor can be arranged at the upper end of the vibration damping body 100, and the vibration damping effect of the vehicle interior floor is realized through the elastic expansion of the vibration damping body 100.
As shown in fig. 1, the damping body 100 is provided with a plurality of through holes 200 penetrating through the damping body 100, the plurality of through holes 200 are parallel to each other, the through holes 200 are arranged along the extending direction of the floor, and the through holes 200 have a first inner wall 210 and a second inner wall 220 which are oppositely arranged along the extending direction of the damping body 100; that is, the through-hole 200 is horizontally arranged, the first inner wall 210 is an upper surface of the through-hole 200, the first inner wall 210 is a side close to the interior floor, the second inner wall 220 is a lower surface of the through-hole 200, and the second inner wall 220 is a side close to the vehicle body floor.
The interior floor vibrates and presses the vibration damping body 100, and the vibration damping body 100 is compressed to have the first inner wall 210 and the second inner wall 220 in a separated state and an abutting state. In the separated state, the through-hole 200 is in an open state, and the first inner wall 210 and the second inner wall 220 are separated from each other with a space therebetween; in the abutting state, the first inner wall 210 and the second inner wall 220 abut against each other, and the through-hole 200 is in the closed state.
In the present embodiment, the interior floor, the vehicle body floor, and the vibration damping body 100 are generally disposed horizontally, and therefore the horizontal direction of the vibration damping body 100 is regarded as the lateral direction, and the direction in which the vibration damping body 100 is compressed and contracted is regarded as the tangential direction. The through hole 200 is formed in the vibration damping body 100, so that the rigidity of the vibration damping body 100 in the tangential direction is reduced, the rigidity is reduced, the vibration damping efficiency of the vibration damping body 100 is improved, therefore, the through hole 200 starts to contract when the vibration damping body 100 is under pressure, the first inner wall 210 and the second inner wall 220 are both in a separation state before the through hole 200 starts to contract and the through hole 200 is completely closed, in this state, the interior pressing plate extrudes the vibration damping body 100, the vibration damping body 100 provides first elastic force for the interior floor, the first elastic force can also increase along with the pressure, the contraction degree of the through hole 200 is changed, and in the process, the vibration damping body 100 has small rigidity and high-efficiency vibration damping performance.
When the pressure applied to the vibration damping body 100 is increased, the through hole 200 is contracted until the through hole is completely closed, at this time, the first inner wall 210 is abutted to the second inner wall 220, the through hole 200 does not provide a buffer space for the vibration damping body 100, the vibration damping contraction of the vibration damping body 100 is completely performed by the body of the vibration damping body 100, the working stiffness of the vibration damping body 100 is supported by the base material with high stiffness, the vibration damping body 100 provides a second elastic force for the floor, and the second elastic force is obviously greater than the first elastic force, so that greater pressure can be supported, and the interior floor is prevented from sinking too much.
Therefore, the vibration damping body is provided with the holes, so that the low-rigidity design of the high-rigidity elastomer is realized, the noise in the vehicle is reduced, the variable-rigidity design of the vibration damper is realized, namely, the vibration damper has small normal load, high rigidity and high efficiency, and the high rigidity is subjected to overload protection during overload, so that high-rigidity support is realized, and the damage to the floor caused by the overlarge floor sinking is avoided; the low-frequency vibration damping device has the advantages that the low-frequency vibration damping performance is realized, the tangential rigidity is not reduced, the vibration damping efficiency is improved, the transverse support stability is met, and the tangential rigidity requirement of a vehicle curve road section is well met.
In this embodiment, along the telescopic direction of the vibration damping body 100, the vibration damping body 100 is provided with a plurality of rows of first through holes and at least one row of second through holes, each row of first through holes and each row of second through holes are all arranged along the extending direction of the floor, a row of second through holes is provided between every two adjacent rows of first through holes, and each second through hole and two adjacent first through holes are arranged in a staggered manner along the extending direction of the floor.
In one embodiment, the length of the second through hole is larger than the distance between two adjacent first through holes along the extending direction of the floor. As shown in fig. 1, two adjacent through holes 200 at different positions are staggered, that is, the through hole 200 located below is correspondingly disposed at the gap between two adjacent through holes 200 above, and two ends of the through hole 200 below respectively extend to the lower ends of two adjacent through holes 200 above, so that the length of the through hole 200 can be set to be greater than the distance between two adjacent through holes 200 in the horizontal direction, and thus, it is ensured that the through hole 200 is disposed in any vertical direction of the damping body 100, and the overall damping effect of the damping body 100 in the telescopic direction thereof is ensured.
As shown in fig. 1 and 4, in the present embodiment, the distance h between the first inner wall 210 and the second inner wall 220 is smaller than the length of the through hole 200 along the floor extension direction, so that the through hole 200 is in a flat shape, the through hole 200 in the flat shape facilitates the contraction of the vibration damping body 100 in the tangential direction, and simultaneously ensures the support stability of the vibration damping body 100 in the transverse direction, thereby achieving the efficient vibration damping of the floor vibration damping structure and improving the support stability of the vibration damping structure in the transverse direction.
As shown in fig. 4, in one embodiment, the distance between the first inner wall 210 and the second inner wall 220 gradually decreases from the two sides of the through hole 200 to the center of the through hole 200. The design is matched with the flat shape of the through hole 200, so that the shrinkage deformation of the through hole 200 is facilitated, and the small rigidity and high-efficiency vibration damping performance of the vibration damper are improved.
In one embodiment, the first inner wall 210 and the second inner wall 220 are respectively arc surfaces, when the first inner wall 210 contacts with the second inner wall 220, the first inner wall 210 and the second inner wall 220 gradually contact and offset from the middle to two sides, the abutting area gradually increases, and the smooth transition of the extrusion of the through hole 200 is realized.
As shown in fig. 4, in one embodiment, the two side surfaces of the through hole 200 connecting the first inner wall 210 and the second inner wall 220 are arc surfaces, and the two sides of the through hole 200 are arc surfaces, so that the through hole 200 is deformed under pressure, and the two sides of the through hole 200 are prevented from being broken and damaged.
In one embodiment, the first inner wall 210 and the second inner wall 220 are respectively a plane, and the length of the plane is d2, so that the first inner wall 210 and the second inner wall 220 are completely attached to each other, and the closing flatness of the through hole 200 is improved.
As shown in FIG. 4, the main parameters of the through-hole 200 include the radius of the R-circle, the distance of the d 1-circle, the length of the d 2-straight line segment and the h-height, and different vibration damping performances can be realized through the above parameter settings.
As shown in fig. 2, in the present embodiment, a plurality of through holes 200 are provided along the extension direction of the damping body 100, so as to improve the damping strength of the damping body 100; a plurality of through holes 200 can also be arranged along the extending direction of the floor, so that the low-rigidity vibration reduction effect of the whole vibration reduction plane of the vibration reducer is realized.
The number, size and density of the through holes 200 in the embodiment can be actually achieved according to actual vibration reduction requirements, the number, size and density of the through holes 200 are increased, and the vibration reduction performance of the vibration reducer with small rigidity and high efficiency can be improved.
As shown in fig. 1, in one embodiment, the side surface of the damping body 100 is provided with an open slot 300, the open slot 300 is parallel to the axis of the through hole 200, the open slot 300 and the through hole 200 have the same function, and the open slot 300 is arranged at the edge of the damping body 100, so as to prevent the surface of the damping body 100 from deforming when being extruded, reduce the vertical rigidity of the edge of the damping body 100, and improve the damping performance of small loads.
In this embodiment, the through holes 200 may be arranged periodically, may realize a specific frequency band damping performance, and may also be arranged irregularly according to actual requirements.
In one embodiment, a first damping region and a second damping region may be disposed on the damping body 100, the through holes 200 of the first damping region and the second damping region have different opening densities, and the through holes 200 of the first damping region and the second damping region have different sizes and numbers. The first damping region and the second damping region have different damping properties, respectively.
Therefore, different hole designs can be made at different positions of the same damping body 100, so that the damping body 100 has different damping areas, and different damping requirements of the interior floor are improved.
As shown in fig. 3, in one embodiment, one end of the damping body 100 in the telescopic direction thereof is provided with a first mounting seat 400 for connecting an interior floor, and the other end of the damping body 100 in the telescopic direction thereof is provided with a second mounting seat 500 for connecting a vehicle body floor. Both ends of the second mounting seat 500 extend out of the vibration damping body 100, and the extended portion serves as a mounting portion having a mounting hole 510 formed in a surface thereof for bolting with a vehicle body floor. The first mounting seat 400 may be bolted or directly overlapped with the interior trim floor.
In this embodiment, the damping body 100, the first mounting seat 400 and the second mounting seat 500 may be integrated by gluing, mechanical fixing, or vulcanization.
In this embodiment, the damping body 100 may be made of a polymer material or a metal material, so as to improve the adaptability of the damper to environments such as high temperature, low temperature, oil contamination, rubber aging, and the like, and have higher severe environment adaptability and high and low temperature adaptability.
The embodiment of the invention also provides a railway vehicle, which is provided with the interior floor and the vehicle body floor, wherein the floor vibration damping structure is arranged between the interior floor and the vehicle body floor.
When the interior floor recognizes the load, the damping body 100 is compressed, and the through hole 200 starts to be closed; before the through hole 200 is closed, the vibration damper has small rigidity and high-efficiency vibration damping performance; when bearing excessive load or bearing impact load (such as passenger jumping), the through hole 200 is closed, the working rigidity of the shock absorber is supported by the large rigidity of the base material, the floor is prevented from being damaged due to excessive floor sinking, and the maximum floor sinking is about h. The variable-rigidity design of the shock absorber is realized through the method, namely, normal load is small, rigidity is high, vibration is efficiently absorbed, and large rigidity overload protection is realized during overload.
When the shock absorber is designed, the base material (metal or various high polymer materials) and the elastic modulus of the shock absorbing body can be selected according to the actual working condition requirements such as the application environment (such as the use temperature, whether oil stains exist or not) and the requirement of transverse rigidity, the size, the number and the arrangement position of the through holes 200 are designed, and the continuous correction parameters of the sample piece test are carried out to meet the requirement of the shock absorbing design performance of the shock absorbing body.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A floor vibration dampening structure, comprising:
the damping body is provided with a plurality of through holes arranged at intervals along the extension direction of the floor, and each through hole is provided with a first inner wall and a second inner wall which are oppositely arranged along the extension direction of the damping body;
the first inner wall and the second inner wall have a separated state and an abutting state;
in the separated state, the vibration damping body provides first elastic force for the floor;
under the abutting state, the vibration reduction body provides a second elastic force for the floor;
wherein the second elastic force is greater than the first elastic force.
2. The vibration damping structure for floors according to claim 1, wherein the vibration damping body is provided with a plurality of rows of first through holes and at least one row of second through holes along a telescopic direction of the vibration damping body, each row of the first through holes and each row of the second through holes are arranged along an extending direction of the floor, one row of the second through holes is arranged between every two adjacent rows of the first through holes, and each second through hole is arranged in a staggered manner with two adjacent first through holes along the extending direction of the floor.
3. The vibration damping structure for floor boards according to claim 2, wherein the length of the second through holes in the extending direction of the floor boards is larger than the interval between the adjacent two of the first through holes.
4. The vibration damping structure for floor according to claim 1, wherein a distance between the first inner wall and the second inner wall is smaller than a length of the through hole in an extending direction of the floor.
5. The vibration damping structure for floor according to claim 4, wherein a distance between the first inner wall and the second inner wall is gradually reduced from both sides of the through hole toward a center of the through hole.
6. The floor vibration damping structure according to claim 4, characterized in that the first inner wall and the second inner wall are curved surfaces that are convex toward each other.
7. The vibration damping structure for floor according to claim 1, wherein both side surfaces of the through hole connecting the first inner wall and the second inner wall are curved surfaces.
8. The floor vibration damping structure according to any one of claims 1 to 7, characterized in that a side surface of the vibration damping body is provided with an open groove, an axis of the open groove being parallel to an axis of the through hole.
9. The floor vibration damping structure according to any one of claims 1 to 7, wherein one end of the vibration damping body in the telescopic direction thereof is provided with a first mounting seat for connecting an interior floor, and the other end of the vibration damping body in the telescopic direction thereof is provided with a second mounting seat for connecting a vehicle body floor.
10. A rail vehicle comprising an interior floor and a body floor, wherein the floor vibration damping structure according to any one of claims 1 to 9 is provided between the interior floor and the body floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211035809.9A CN115285159A (en) | 2022-08-26 | 2022-08-26 | Floor vibration damping structure and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211035809.9A CN115285159A (en) | 2022-08-26 | 2022-08-26 | Floor vibration damping structure and rail vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115285159A true CN115285159A (en) | 2022-11-04 |
Family
ID=83831304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211035809.9A Pending CN115285159A (en) | 2022-08-26 | 2022-08-26 | Floor vibration damping structure and rail vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115285159A (en) |
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2022
- 2022-08-26 CN CN202211035809.9A patent/CN115285159A/en active Pending
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