Composite material connecting structure and rail transit vehicle

Abstract

The utility model discloses a composite material connecting structure and a rail transit vehicle, and relates to the technical field of rail transit vehicles, the composite material connecting structure comprises a first component, a second component, a supporting sleeve and a rivet body, the second component is fixedly connected with the first component; a through fixing hole is formed between the second component and the first component; the supporting sleeve is fixedly arranged in the fixing hole; the rivet body is arranged in the supporting sleeve in a penetrating mode, and a first rivet joint and a second rivet joint are formed at the two ends of the rivet body respectively. A flange ring is formed at the end, facing the first component, of the supporting sleeve and abuts against the first rivet joint. A second orifice edge is formed at the end, facing the second component, of the fixing hole and abuts against the second rivet joint. According to the utility model, the supporting sleeve not only can increase the contact area of the composite material and reduce the risk that the rivet body is pulled off, but also can isolate the rivet body from the composite material, so that the mechanical damage of the rivet body to the hole wall of the composite material in the riveting process is reduced, and the mechanical connection strength of the composite material is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit vehicle technical field, especially a kind of composite connecting structure and rail transit vehicle. BACKGROUND

[0002] Carbon fiber reinforced composite material is the composite material formed with carbon fiber or carbon fiber fabric as reinforcing body, with resin, ceramic, metal, cement, carbonaceous or rubber as matrix, with the characteristics of light weight and high strength, can improve the overall mechanical strength of equipment, reduce overall quality, prolong service life, and is widely used in aerospace, automobile manufacturing and wind power generation and other fields. At present, the use of advanced composite materials represented by carbon fiber reinforced composite materials has become one of the indicators to measure the level of high-end equipment manufacturing.

[0003] Rivet connection belongs to mechanical connection, and is a commonly used connection method for composite materials. Compared with other connection methods, riveting has higher connection strength, but stress concentration is easy to occur, and adhesive bonding can relieve stress concentration, and riveting and hinging are usually used comprehensively.

[0004] During the shear tensile test of the adhesive riveted joint, the adhesive strength of the adhesive is higher than the mechanical connection strength of the rivet, which may cause the mechanical connection part of the rivet to fail first. During the riveting process, the rivet sleeve at the head of the rivet is extruded and deformed, forming a side constraint on the base material. However, the protruding part of the rivet sleeve is extruded into the base material, causing damage to the base material. This damage reduces the effective clamping length of the rivet, i.e. the effective length of the rivet in contact with the base material is reduced, resulting in a decrease in the mechanical connection strength of the rivet. SUMMARY

[0005] The utility model aims at providing a kind of composite connecting structure and rail transit vehicle, by adding support sleeve between first component and second component, rivet body is isolated with composite material, avoid rivet body damage the hole wall of composite material, solve the technical problem that the mechanical connection strength of rivet is reduced by the hole wall of composite material damaged by existing rivet joint.

[0006] To achieve the above-mentioned purpose, the utility model provides a kind of composite connecting structure, comprising:

[0007] first component;

[0008] second component, the second component is fixedly connected with the first component;Through the fixed hole is formed between the second component and the first component;

[0009] support sleeve, the support sleeve is fixedly arranged in the fixed hole;

[0010] The rivet body is arranged in the supporting sleeve, and two ends of the rivet body are respectively provided with a first riveting head and a second riveting head; the supporting sleeve is provided with a flange ring at one end facing the first component, and the flange ring is in abutment with the first riveting head; and the fixed hole is provided with a second orifice edge at one end facing the second component, and the second orifice edge is in abutment with the second riveting head.

[0011] In some embodiments, the fixed hole is provided with a first orifice edge at one end facing the first component, and the first orifice edge is formed into an arc edge through a rounded corner; the supporting sleeve comprises a sleeve body coaxially provided with the flange ring at one end, and an arc groove is formed at the connection between the sleeve body and the flange ring, and the arc edge and the arc groove are in concave-convex cooperation.

[0012] In some embodiments, the diameter of the flange ring is greater than the diameter of the sleeve body; the fixed hole is provided with a limiting surface along the hole at one end facing the first component, and two ends of the flange ring are in abutment with the limiting surface and the first riveting head respectively.

[0013] In some embodiments, the outer side surface of the sleeve body is fixedly connected with the inner side surface of the fixed hole, and the length of the sleeve body is equal to the depth of the fixed hole.

[0014] In some embodiments, the center of the supporting sleeve is provided with a mounting hole, the mounting hole is provided with a stop groove along the hole, and the wrinkle protrusion of the first riveting head is in abutment with the stop groove.

[0015] In some embodiments, the stop groove is an arc groove, and the arc groove is in concave-convex cooperation with the arc surface of the first riveting head.

[0016] In some embodiments, the mounting hole further comprises a cylindrical hole coaxially penetrating the stop groove, and the rivet body passes through the cylindrical hole; the diameter of the stop groove is greater than the diameter of the cylindrical hole, and a stop step is formed at the connection between the stop groove and the cylindrical hole.

[0017] In some embodiments, an intermediate adhesive layer is formed between the contact surfaces of the first component and the second component.

[0018] In some embodiments, the first component and the second component are both flat plates.

[0019] The utility model also provides a rail transit vehicle comprising the composite connection structure.

[0020] The utility model discloses a composite material connecting structure, which is characterized by comprising a first component, a second component and a supporting sleeve.

[0021] The supporting sleeve can increase the contact area of the composite material, reduce the risk of the rivet body being pulled out, isolate the rivet body from the composite material, greatly reduce the mechanical damage of the composite material hole wall during the riveting process of the rivet body, and effectively improve the mechanical connection strength of the composite material. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only the embodiments of the utility model, and those skilled in the art can obtain other drawings according to the provided drawings without creative labor.

[0023] Figure 1 The utility model provides a composite material connecting structure's section view for the embodiment of the utility model;

[0024] Figure 2 For Figure 1 The assembly drawing between the first component, the second component and the supporting sleeve in the utility model;

[0025] Figure 3 For Figure 1 The assembly drawing of the first component and the second component in the utility model;

[0026] Figure 4 For Figure 1 The section view of the supporting sleeve in the utility model;

[0027] Figure 5 For Figure 1 The section view of the supporting sleeve with the size in the utility model.

[0028] The signs are as follows:

[0029] The first component 1, the second component 2, the fixed hole 3, the supporting sleeve 4, the rivet body 5 and the intermediate adhesive layer 6;

[0030] The first hole edge 31 and the second hole edge 32;

[0031] Flange ring 41, sleeve body 42, circular arc groove 43 and mounting hole 44;

[0032] Stop groove 441 and cylindrical hole 442;

[0033] First rivet head 51 and second rivet head 52. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0036] The present application discloses a composite material connecting structure, as shown in the accompanying drawings Figure 1 The second member 2 is fixedly connected with the first member 1, and a through fixing hole 3 is formed between the second member 2 and the first member 1. That is, the first member 1 forms a first through hole, and the second member 2 forms a second through hole. The first through hole and the second through hole are coaxial and through to form the fixing hole 3. The first member 1 and the second member 2 are preferably arranged in a stacked manner to attach Figure 1 For example, the first member 1 is located above the second member 2. The first member 1 and the second member 2 can both be flat plates, but are not limited thereto.

[0037] The support sleeve 4 is fixedly arranged in the fixing hole 3, and the rivet body 5 is arranged in the support sleeve 4, so that the support sleeve 4 replaces the fixing hole 3 to support the rivet body 5. The two ends of the rivet body 5 form a first rivet head 51 and a second rivet head 52 respectively during the riveting process. The end of the support sleeve 4 towards the first member 1 forms a flange ring 41, and the flange ring 41 abuts against the first rivet head 51. The end of the fixing hole 3 towards the second member 2 forms a second hole edge 32, and the second hole edge 32 abuts against the second rivet head 52, so that the first member 1 and the second member 2 are fixed between the first rivet head 51 and the second rivet head 52 by means of the support sleeve 4.

[0038] In the present application, the support sleeve 4 is arranged, which can increase the contact area with the composite material, reduce the risk of rivet body 5 pulling out, isolate the rivet body 5 from the composite material, greatly reduce the mechanical damage of the rivet body 5 to the composite material hole wall during the riveting process, and effectively improve the mechanical connection strength of the composite material.

[0039] As a preferred embodiment, as shown in the appendix Figure 3 As shown, the fixing hole 3 has a first opening edge 31 at the end facing the first component 1, and the first opening edge 31 is rounded to form an arc edge. The support sleeve 4 includes a sleeve body 42 with a flange ring 41 coaxially provided at one end. An arc groove 43 is formed at the connection between the sleeve body 42 and the flange ring 41, and the arc edge and the arc groove 43 are in a concave-convex fit. By adding a rounded corner to the opening of the support sleeve 4, the stress concentration at the contact point between the support sleeve 4 and the rivet body 5 due to deformation under force is reduced, and the curvature of the support sleeve 4 due to tensile force is effectively adjusted. When subjected to shear load, the first rivet joint 51 and the second rivet joint 52 can withstand a greater compressive load, effectively preventing the rivet body 5 from being pulled out, and further improving the mechanical connection strength between the first component 1 and the second component 2.

[0040] As attached Figure 2 As shown, the diameter of the flange ring 41 is larger than the diameter of the sleeve body 42; a limiting surface is formed along the end of the fixing hole 3 facing the first component 1, and the two ends of the flange ring 41 abut against the limiting surface and the first rivet joint 51 respectively, which can limit the position of the support sleeve 4 in the fixing hole 3 and provide support for the first rivet joint 51.

[0041] The outer surface of the sleeve body 42 is fixedly connected to the inner surface of the fixing hole 3, so that the support sleeve 4 is reliably fixed in the fixing hole 3. The length of the sleeve body 42 is equal to the depth of the fixing hole 3 to avoid the rivet body 5 being too long and causing the first component 1 and the second component 2 to be loosely connected.

[0042] As attached Figure 4 As shown, a mounting hole 44 is formed in the center of the support sleeve 4, and a stop groove 441 is formed along the edge of the mounting hole 44. The pleated protrusion of the first rivet joint 51 abuts against the stop groove 441, so that the first rivet joint 51 is partially embedded in the support sleeve 4, and the contact area between the first rivet joint 51 and the support sleeve 4 is increased, thereby improving the connection strength between the first rivet joint 51 and the support sleeve 4.

[0043] The stop groove 441 is an annular groove, which fits in a concave-convex manner with the arc surface of the first rivet joint 51, further increasing the contact area between the first rivet joint 51 and the support sleeve 4 and improving the connection strength.

[0044] Specifically, as shown in the attached document Figure 5 As shown, the support sleeve 4 has a diameter of 10mm, the flange ring 41 has a diameter of 18mm, the sleeve body 42 has a diameter of 8.6mm, the radius of the arc groove 43 at the connection between the sleeve body 42 and the flange ring 41 is 2mm, and the radius of the arc groove 43 of the stop groove 441 is 1.5mm.

[0045] The mounting hole 44 also includes a cylindrical hole 442 that is coaxially connected to the stop groove 441, through which the rivet body 5 passes. The diameter of the stop groove 441 is larger than the diameter of the cylindrical hole 442, so that a stop step is formed between the stop groove 441 and the cylindrical hole 442. The stop step abuts against the first rivet joint 51 to ensure stable support of the first rivet joint 51.

[0046] An intermediate adhesive layer 6 is formed between the contact surfaces of the first component 1 and the second component 2 to fix the first component 1 and the second component 2. The intermediate adhesive layer 6 may contain an adhesive. It should be noted that before applying the adhesive, the contact surfaces between the first component 1 and the second component 2 should be cleaned with alcohol first, and then a plasma surface treatment process should be used to increase the bonding strength of the adhesive interface and improve the bonding strength between the first component 1 and the second component 2.

[0047] This utility model also provides a rail transit vehicle, including the above-mentioned composite material connection structure.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A composite material connection structure, characterized in that, include: First component (1); The second component (2) is fixedly connected to the first component (1); a through fixing hole (3) is formed between the second component (2) and the first component (1). Support sleeve (4), the support sleeve (4) is fixed in the fixing hole (3); The rivet body (5) is inserted into the support sleeve (4). The two ends of the rivet body (5) are respectively formed with a first rivet joint (51) and a second rivet joint (52). The support sleeve (4) has a flange ring (41) at one end facing the first component (1), and the flange ring (41) abuts against the first rivet joint (51). The fixing hole (3) has a second hole edge (32) at one end facing the second component (2), and the second hole edge (32) abuts against the second rivet joint (52).

2. The composite connection structure according to claim 1, characterized in that, The fixing hole (3) has a first hole edge (31) at one end facing the first component (1), and the first hole edge (31) is formed into a rounded edge by rounding the corner; the support sleeve (4) includes a sleeve body (42) with the flange ring (41) coaxially provided at one end, and a rounded groove (43) is formed at the connection between the sleeve body (42) and the flange ring (41), and the rounded edge and the rounded groove (43) are in concave-convex fit.

3. The composite connection structure according to claim 2, characterized in that, The diameter of the flange ring (41) is larger than the diameter of the sleeve body (42); the fixing hole (3) forms a limiting surface along one end of the hole facing the first component (1), and the two ends of the flange ring (41) abut against the limiting surface and the first rivet joint (51) respectively.

4. The composite connection structure according to claim 3, characterized in that, The outer side of the sleeve body (42) is fixedly connected to the inner side of the fixing hole (3), and the length of the sleeve body (42) is equal to the depth of the fixing hole (3).

5. The composite connection structure according to any one of claims 1 to 4, characterized in that, The support sleeve (4) has a mounting hole (44) at its center, and a stop groove (441) is formed along the edge of the mounting hole (44). The folded protrusion of the first rivet joint (51) abuts against the stop groove (441).

6. The composite connection structure according to claim 5, characterized in that, The stop groove (441) is an annular groove, which is in concave-convex fit with the arc surface of the first rivet joint (51).

7. The composite connection structure according to claim 5, characterized in that, The mounting hole (44) also includes a cylindrical hole (442) that is coaxially connected to the stop groove (441), and the rivet body (5) passes through the cylindrical hole (442); the diameter of the stop groove (441) is larger than the diameter of the cylindrical hole (442), and a stop step is formed at the connection between the stop groove (441) and the cylindrical hole (442).

8. The composite connection structure according to any one of claims 1 to 4, characterized in that, An intermediate adhesive layer (6) is formed between the contact surfaces of the first component (1) and the second component (2).

9. The composite connection structure according to any one of claims 1 to 4, characterized in that, Both the first component (1) and the second component (2) are flat.

10. A rail transit vehicle, characterized in that, Includes the composite connection structure as described in any one of claims 1 to 9.

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