Vibration reduction structure, sectional material and vehicle body

Abstract

The utility model relates to the technical field of vehicle noise reduction, in particular to a vibration reduction structure, a profile and a vehicle body, the vibration reduction structure comprises a vibration reduction assembly, the vibration reduction assembly comprises an attaching wall and a vibration reduction piece which are fixedly connected with each other, the attaching wall comprises a first side face and a second side face which are opposite to each other in the first direction, and the first side face is used for being attached to the profile; the second side face is provided with a damping piece. One end, connected with the attaching wall in the first direction, of the vibration reduction piece points to the other end, and the size of the vibration reduction piece in the second direction is reduced. According to the vibration reduction structure, the sectional material and the vehicle body, damage to the sectional material structure is reduced, so that the absorption rate of the vibration reduction structure to sectional material vibration is increased, and rapid consumption of vibration absorbed by the attached wall through the end, away from the attached wall, of the vibration reduction piece is effectively achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of batteries, in particular to a damping structure, a profile and a vehicle body. BACKGROUND

[0002] With the development of train technology, the comfort of train operation is gradually concerned, and the damping and noise reduction of the train body is the key to improving the comfort of the train. On the one hand, the vibration under the train will be transmitted into the train through the profile of the train body; on the other hand, the vibration of the profile itself will also produce sound radiation.

[0003] The additional acoustic damping technology is a new wave control method, which has broad application prospects in the field of damping and noise reduction. The principle is to gradually reduce the speed of bending waves during propagation through special structural design, compress the wavelength, and concentrate energy at the edge of the structure, thereby achieving the effect of damping.

[0004] However, the additional acoustic damping structure is usually fixed on the surface of the profile of the train body by riveting, screwing and the like, and the structure of the additional acoustic damping structure is complex (for example, the damping structures described in Chinese patent documents CN113619629A and CN113799820A), which needs to damage the structure of the profile of the train body, affecting the structural strength and stability of the profile.

[0005] In addition, the additional acoustic damping structure occupies the internal space of the train body, affecting the space of the train body. CONTENT OF THE INVENTION

[0006] The purpose of the application is to provide a damping structure, a profile and a vehicle body, so as to solve the technical problem in the prior art that the additional acoustic damping structure is usually fixed on the surface of the profile of the train body by riveting, screwing and the like, and the structure of the additional acoustic damping structure is complex, which needs to damage the structure of the profile of the train body, affecting the structural strength and stability of the profile.

[0007] According to a first aspect of the application, a damping structure is provided, comprising a damping assembly, the damping assembly comprising a fitting wall and a damping sheet fixedly connected to each other, the fitting wall comprising a first side and a second side opposite to each other in a first direction, the first side being used for fitting with a profile, and the second side being provided with the damping sheet.

[0008] The size of the damping sheet in a second direction is reduced in the direction from one end to the other end of the damping sheet connected to the fitting wall in the first direction, and the first direction is perpendicular to the second direction.

[0009] Preferably, a plurality of damping sheets are arranged on the fitting wall and are arranged in the second direction.

[0010] Preferably, the damping sheet satisfies: T = T0 + εx m wherein T is a size of the damping sheet in the second direction at a predetermined position of the damping sheet, the predetermined position is a position of the damping sheet at a distance x in the first direction to the fitting wall, T0 is a minimum value of the size of the damping sheet in the second direction, ε is a constant coefficient, and m ≥ 2.

[0011] Preferably, one of two sides of the damping sheet opposite to each other in the second direction is a plane perpendicular to the fitting wall, and the other of the two sides of the damping sheet opposite to each other in the second direction is a curved surface.

[0012] Preferably, the damping assembly further comprises a damping block, the damping block is arranged at an end of the damping sheet away from the fitting wall.

[0013] The damping block is fitted with the curved surface.

[0014] Preferably, for a plurality of damping sheets arranged on the same fitting wall, the curved surface of each damping sheet is arranged towards the same direction.

[0015] Preferably, comprising:

[0016] Two damping assemblies, the two damping assemblies are arranged opposite to each other in the first direction, and the damping sheets of the two damping assemblies are arranged between the fitting walls of the two damping assemblies.

[0017] A connecting wall extending in the first direction, the connecting wall connecting the fitting walls of the two damping assemblies.

[0018] Preferably, the damping sheets of the two damping assemblies are arranged alternately in the second direction.

[0019] And / or, the direction of the curved surface of the damping sheet of one of the two damping assemblies is opposite to the direction of the curved surface of the damping sheet of the other of the two damping assemblies.

[0020] According to the second aspect of the present application, a profile is provided, comprising the damping structure of any one of the technical solutions described above, thus having all the beneficial technical effects of the damping structure, which will not be repeated here.

[0021] According to the third aspect of the present application, a vehicle body is provided, comprising the damping structure and / or the profile of any one of the technical solutions described above, thus having all the beneficial technical effects of the damping structure and the profile, which will not be repeated here.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] The damping structure provided by the application is attached to the first side of the attachment wall and the profile, which can effectively replace the current connection of the damping structure and the profile by riveting, screwing and the like, reduces the damage to the profile structure, effectively ensures the contact area of the attachment wall and the profile, and improves the absorption rate of the profile vibration of the damping structure, and the vibration sheet fixedly connected to the second side of the attachment wall is used to effectively realize the rapid consumption of the vibration absorbed by the attachment wall through the thin wall end (i.e., the end of the damping sheet away from the attachment wall) of the damping sheet.

[0024] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings without creative labor based on these drawings.

[0026] Figure 1 The axial structure schematic diagram of the damping structure provided by the embodiment of the application is shown in the figure.

[0027] Figure 2 The axial structure schematic diagram of the damping sheet and the damping block assembly structure provided by the embodiment of the application is shown in the figure.

[0028] Figure 3 The assembly structure schematic diagram of the damping structure and the profile provided by the embodiment of the application is shown in the figure.

[0029] Figure 4 The average mean square speed diagram of the profile surface obtained by simulation is shown in the figure.

[0030] Reference signs:

[0031] 1-damping structure; 11-attachment wall; 12-damping sheet; 13-damping block; 14-connection wall; 2-profile body; F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0032] The technical solutions of the application will be described in detail below with reference to the drawings. Obviously, the described embodiments are some embodiments of the application, not all embodiments of the application.

[0033] The components of the application embodiments described and illustrated herein can be arranged and designed in a wide variety of different configurations. Therefore, the following detailed description of the application, read with reference to the accompanying drawings, is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application.

[0034] All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present application without creative effort are within the scope of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The following refers to Figures 1 to 4 A damping structure, a profile and a vehicle body according to some embodiments of the present application are described.

[0038] Referring to Figures 1 to 4 The embodiment of the first aspect of the present application provides a damping structure, which comprises a damping assembly, the damping assembly comprises a fitting wall 11 and a damping sheet 12 fixedly connected with each other, the fitting wall 11 comprises a first side and a second side opposite to each other in a first direction F1, the first side is used for fitting with a profile, and the second side is provided with the damping sheet 12. The size of the damping sheet 12 in a second direction F2 decreases in the direction from one end to the other end of the damping sheet 12 connected with the fitting wall 11 in the first direction F1, and the first direction F1 is perpendicular to the second direction F2.

[0039] According to the damping structure provided by the technical features, by the first side surface of the fitting wall 11 being fitted with the profile, on the one hand, the damping structure can effectively replace the current connection of the damping structure with the profile by riveting, screwing and the like, reducing the damage to the profile structure; on the other hand, the contact area of the fitting wall 11 with the profile can be effectively ensured to improve the absorption rate of the damping structure to the vibration of the profile; and by the vibration sheet fixedly connected with the second side surface of the fitting wall 11, the structure that the size of the damping sheet 12 in the second direction F2 is reduced in the direction from one end connected with the fitting wall 11 to the other end of the damping sheet 12 in the first direction F1 is used to effectively realize the rapid consumption of the vibration absorbed by the fitting wall 11 through the thin wall end of the damping sheet 12 (i.e., the end of the damping sheet 12 away from the fitting wall 11).

[0040] As shown in Figures 1 to 3 , F1 shown in the figure can be an example of the first direction F1 described above, and F2 shown in the figure can be an example of the second direction F2 described above. For ease of description, the direction perpendicular to the first direction F1 and the second direction F2 is defined as the third direction F3. F3 shown in the figure can be an example of the third direction F3.

[0041] It should be noted that the fitting of the fitting wall 11 with the profile can be understood as that the first side surface of the fitting wall 11 and the surface of the profile are connected and fixed by means of gluing, welding, hot melting and the like.

[0042] Preferably, as shown in Figure 1 , a plurality of damping sheets 12 described above can be provided on the fitting wall 11, and the plurality of damping sheets 12 are arranged at intervals along the second direction F2 to improve the damping rate and damping capacity of the damping structure.

[0043] Preferably, as shown in Figure 2 , the damping sheet 12 can satisfy: T = T0 + εx m , where T is the size of the damping sheet 12 in the second direction F2 at a predetermined position of the damping sheet 12, the distance of the damping sheet 12 in the first direction F1 to the fitting wall 11 at the predetermined position is x, T0 is the minimum value of the size of the damping sheet 12 in the second direction F2, ε is a constant, and m ≥ 2, to further improve the damping capacity of the damping sheet 12.

[0044] Preferably, as shown in Figure 1 and Figure 2As shown, one of the two sides of the damping sheet 12 in the second direction F2 can be a plane perpendicular to the abutting wall 11. The other of the two sides of the damping sheet 12 in the second direction F2 is a curved surface. On one hand, the curved surface can adapt to the thickness variation of the damping sheet 12. On the other hand, the side of the damping sheet 12 in the second direction F2 is set as a plane, which can facilitate the arrangement of the damping sheet 12 in the second direction F2, further improve the arrangement density of the damping assembly in the second direction F2, and not only improve the damping capacity of the damping structure, but also effectively improve the space utilization of the damping structure.

[0045] Preferably, as shown, for the plurality of damping sheets 12 arranged on the same abutting wall 11, the curved surface of each damping sheet 12 is arranged in the same direction, which not only facilitates the molding of the damping sheet 12, but also effectively facilitates the arrangement of the structure of the two damping assemblies. Figure 1

[0046] However, it is not limited thereto, as long as the damping effect of the damping structure can be achieved, the curved surface of each damping sheet 12 of the plurality of damping sheets 12 on the same abutting wall 11 can also be arranged in the opposite direction.

[0047] In the embodiment, as shown, the damping structure can include two damping assemblies, and the damping sheets 12 of the two damping assemblies are arranged between the abutting walls 11 of the two damping assemblies, so as to facilitate the assembly of the damping structure between the layered gaps of the profile, so that the upper and lower structures of the profile can be abutted with the abutting walls 11 of the two damping assemblies, thereby achieving simultaneous damping of the upper and lower structures and further improving the damping effect of the profile. Figure 1

[0048] Preferably, as shown, the damping structure can further include a connecting wall 14 extending in the first direction F1, and the connecting wall 14 can connect the abutting walls 11 of the two damping assemblies to achieve relative fixation of the two damping assemblies. Figure 1

[0049] Preferably, as shown, the number of the connecting wall 14 can be multiple, so as to improve the connection stability of the two damping assemblies. Figure 1

[0050] As shown, the number of the connecting wall 14 is two, and the two connecting walls 14 are connected head-to-tail with the two abutting walls 11 to form a rectangular frame. However, it is not limited thereto, and the number of the connecting wall 14 can be adjusted according to the size of the damping structure in the second direction F2. Figure 1

[0051] Preferably, as shown, the number of the connecting wall 14 can be multiple, so as to improve the connection stability of the two damping assemblies. Figure 1 ​​​​​As shown, the damping pieces 12 of the two damping assemblies can be arranged alternately in the second direction F2 to ensure consistency of the damping capacity of the two damping assemblies in the second direction F2 and uniform distribution of the damping capacity of each damping assembly in the second direction F2.

[0052] Preferably, as Figure 1 As shown, the damping pieces 12 of one of the two damping assemblies are arranged in the opposite direction to the damping pieces 12 of the other of the two damping assemblies to Figure 1 As shown, the damping pieces 12 of one of the two damping assemblies are arranged in the opposite direction to the damping pieces 12 of the other of the two damping assemblies to

[0053] Preferably, as Figure 1 As shown, the damping pieces 12 of one of the two damping assemblies are arranged in the opposite direction to the damping pieces 12 of the other of the two damping assemblies to

[0054] In embodiments, as Figure 1 and Figure 2 As shown, the damping assemblies can further include a damping block 13 arranged at the end of the damping piece 12 away from the abutting wall 11 (i.e., the thin-walled end) to absorb the vibration kinetic energy of the damping piece 12 through the damping block 13, thereby accelerating the consumption of the vibration kinetic energy and avoiding energy accumulation at the thin-walled end of the damping piece, and improving the damping capacity and damping rate of the damping piece 12.

[0055] Preferably, as Figure 1 and Figure 2 As shown, the damping block 13 can be attached to the side of the damping piece 12 on which the curved surface is located, so that the damping block 13 can utilize the recessed space formed by the curved surface to further improve the space utilization of the damping structure.

[0056] However, it is not limited thereto, and as long as the damping block 13 can be attached to the side of the damping piece 12 in the second direction F2, the damping block 13 can also be attached to the side of the damping piece 12 on which the flat surface is located, or both sides of the damping piece 12 in the second direction F2.

[0057] As Figure 4As shown in the figure, the average mean square velocity of the profile surface is obtained by simulating the vibration of the damping structure provided by the application and the current damping structure (for example, a uniform beam) under the condition that the total mass, installation position, coupling area and excitation condition are unchanged. As can be seen from the figure, the damping effect of the damping structure provided by the application is the best, which is obviously superior to the existing damping structure, and the damping structure provided by the application can excite more modes to couple with the profile in the medium and high frequency region, and the damping performance is more superior.

[0058] The damping structure provided by the application provides an effective solution for the damping of the train body and the profile, has the characteristics of simple structure, strong designability, wide application range, large damping frequency range, good damping effect under normal circumstances, and can be directly implemented in the profile structure of the train body, has little effect on the profile structure, does not affect the strength and stability of the vehicle, and has a broad application prospect.

[0059] The embodiment of the second aspect of the application also provides a profile comprising the damping structure described in any of the above embodiments, so that the profile has all the beneficial technical effects of the damping structure, which will not be repeated here.

[0060] Preferably, as Figure 3 As shown, the profile can also include a profile body 2, and the damping structure 1 is arranged in the layered gap. In this way, the damping structure 1 occupies additional space (for example, the space in the train body), thereby improving the space utilization of the profile.

[0061] Optionally, as Figure 3 Figure 3 As shown, the damping structure 1 can be attached to the profile body 2 only with one attached wall 11. However, it is not limited thereto, and the damping structure 1 can also be attached to the upper and lower layers of the layered gap with two attached walls 11, respectively.

[0062] According to the third aspect of the application, a train body is provided, comprising the damping structure and / or the profile according to any of the above technical solutions, so that the train body has all the beneficial technical effects of the damping structure and the train body, which will not be repeated here.

[0063] Optionally, the train body can include a car body floor and a car body side wall.

[0064] Preferably, the car body floor can be provided with the damping structure 1.

[0065] Preferably, the car body side wall can also be provided with the damping structure 1.

[0066] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vibration damping structure characterized by, The damping assembly comprises a fitting wall and a damping sheet fixedly connected to each other, the fitting wall comprises a first side and a second side opposite to each other in a first direction, the first side is used for fitting with a profile, and the second side is provided with the damping sheet; An end of the damping sheet connected to the fitting wall in the first direction points to the direction of another end, and a size of the damping sheet in a second direction is reduced, the first direction is perpendicular to the second direction.

2. The damping structure according to claim 1, characterized by A plurality of the damping sheets are arranged in the second direction and are spaced apart.

3. The damping structure according to claim 2, characterized by The damper sheet satisfies: T = T0 + εx m where T is a dimension in the second direction of a predetermined position of the damper sheet, the predetermined position being a position of the damper sheet at a distance x in the first direction from the fitting wall, T0 is a minimum value of the dimension in the second direction of the damper sheet, ε is a constant factor, and m ≥ 2.

4. The damping structure according to claim 2, characterized by One of two sides of the damping sheet opposite to each other in the second direction is a plane perpendicular to the fitting wall, and the other of the two sides is a curved surface.

5. The damping structure according to claim 4, wherein The damping assembly further comprises a damping block arranged at an end of the damping sheet away from the fitting wall; The damping block is fitted with the curved surface.

6. The damping structure according to claim 5, wherein For a plurality of the damping sheets arranged on the same fitting wall, the curved surface of each of the damping sheets is arranged in the same direction.

7. The damping structure according to any one of claims 4 to 6, characterized by Comprise: Two damping assemblies are arranged opposite to each other in the first direction, and the damping sheets of the two damping assemblies are arranged between the fitting walls of the two damping assemblies; A connecting wall extends in the first direction, and the connecting wall connects the fitting walls of the two damping assemblies.

8. The damping structure according to claim 7, wherein The damping sheets of the two damping assemblies are alternately arranged in the second direction; And / or, the direction of the curved surface of the damping sheet of one of the two damping assemblies is opposite to the direction of the curved surface of the damping sheet of the other of the two damping assemblies.

9. A profile, characterized in that The damping structure comprises any one of claims 1 to 8; And / or, the profile further comprises a profile body provided with a layered gap, and the damping structure is arranged in the layered gap.

10. A vehicle body characterized by comprising: The profile of claim 9 or the damping structure of any one of claims 1 to 8.

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