Plug-in type composite material common effect connection structure and method

Abstract

The invention discloses a plug-in type composite material common effect connecting structure and method, solves the problems that in the prior art, a metal part needs to be embedded in a connecting mode of composite materials, and cracks are easily generated between the composite materials due to the embedded metal part, and has the beneficial effect that the connecting strength of the composite materials is guaranteed. According to the specific scheme, the plug-in type composite material common effect connecting structure comprises a mandrel, the mandrel is inserted into a connecting sleeve, the space between the connecting sleeve and the mandrel is filled with a binding agent, an expansion component is arranged at the end of the connecting sleeve and arranged between the mandrel and the connecting sleeve, and the expansion component comprises an inner expansion sleeve and an outer expansion sleeve; a hollow part is formed between the inner expansion sleeve and the outer expansion sleeve, a conical part is arranged at the hollow part, and the conical part extrudes the inner expansion sleeve inwards through friction force between the conical part and the inner expansion sleeve and friction force between the conical part and the outer expansion sleeve and extrudes the outer expansion sleeve outwards so as to be matched with a binder to achieve stable connection between the mandrel and the connecting sleeve.

Description

Technical Field

[0001] The invention relates to the field of composite material connection, in particular to an insertion type composite material co-effective connection structure and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] For composite materials, the current connection forms of composite materials are mainly: adhesive bonding, riveting, bolting and any two of the above three connection forms are used in combination. Due to the anisotropic characteristics of composite materials, riveting or bolting alone will cause great damage to the material body, which will greatly affect the connection strength and service life. The adhesive interface strength of composite materials is significantly lower than the body strength and has the characteristics of obvious defect expansion. It is generally used in combination with riveting or bolting. Adhesive bonding is the main form of action. Riveting or bolting will play a protective role after the adhesive fails. The mechanism will not fail or be damaged immediately, leaving an opportunity for maintenance or repair. This combination connection method is a single function and compensates for each other's shortcomings. However, whether it is riveting or threaded connection, it is necessary to embed metal parts in the connection area to avoid the connection parts directly pressing the composite part to cause cracks between materials. The embedding of metal parts will not only increase the process and reduce the lightweight effect, but also have poor maintenance. Once the connection parts are damaged, the entire composite part needs to be replaced.

[0004] In addition, during the insertion connection of composite materials, since the bonding surfaces need to have a relative sliding process and pressure cannot be applied to the bonding surfaces, the effective bonding area is relatively low, only 20% to 60%. The bonding efficiency is extremely low, the design is seriously wasted, and there are uncontrollable problems in the connection quality. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an inserted composite material co-effective connection structure, which can effectively solve the problems of excessively long bonding length and uncontrollable bonding quality of the composite material at the inserted connection position through the co-effective connection, effectively improve the connection reliability, reduce design waste, improve quality stability and reduce costs.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] An insertable composite material co-effective connection structure includes a mandrel. The mandrel is inserted into a connecting sleeve, and an adhesive is filled between the connecting sleeve and the mandrel. A tightening member is arranged at the end of the connecting sleeve. The tightening member is arranged between the mandrel and the connecting sleeve. The tightening member includes an inner expansion sleeve and an outer expansion sleeve. A hollow space is formed between the inner expansion sleeve and the outer expansion sleeve. A conical member is arranged in the hollow space. The conical member inwardly presses the inner expansion sleeve and outwardly presses the outer expansion sleeve through the friction force between the conical member and the inner expansion sleeve and the outer expansion sleeve to cooperate with the adhesive to achieve the stable connection between the mandrel and the connecting sleeve.

[0008] For the co-effective connection structure as described above, a tightening member is arranged at the end of the connecting sleeve, and the stable connection between the end of the connecting sleeve and the mandrel is achieved through the tightening member. The overall structure is cooperated by means of bonding and tightening, playing a co-effective role. The two connection methods jointly play a major connection role and protect each other's structures, exponentially improving the connection strength and the safe service life.

[0009] For an insertable composite material co-effective connection structure as described above, the conical member includes a first conical ring and a second conical ring. The first conical ring and the second conical ring are arranged oppositely. The first conical ring and the second conical ring are connected by a plurality of connecting members. During the tightening process of the connecting members, the first conical ring and the second conical ring move towards each other, causing the outer expansion sleeve to expand and the inner expansion sleeve to contract. A large friction force is generated at the contact parts between the first conical ring, the second conical ring and the outer expansion sleeve and the inner expansion sleeve, forming a tightened connection.

[0010] For an insertable composite material co-effective connection structure as described above, considering the structural arrangement, the connecting member is a screw. The first conical ring is provided with a through hole, and the second conical ring is provided with a threaded hole. The screw passes through the through hole and is tightened in the threaded hole, which is convenient for the rapid setting of the connecting member and ensures the connection stability between the first conical ring and the second conical ring to provide acting forces to the outer expansion sleeve and the inner expansion sleeve.

[0011] For an insertable composite material co-effective connection structure as described above, the inner expansion sleeve and the outer expansion sleeve are respectively adapted to the first conical ring and the second conical ring through conical surfaces to ensure the extrusion effect on the outer expansion sleeve and the inner expansion sleeve;

[0012] To ensure the tightening effect, the hollow space between the inner expansion sleeve and the outer expansion sleeve includes a first conical ring hole, a circular ring hole and a second conical ring hole which are connected in sequence. The first conical ring hole and the second conical ring hole are arranged oppositely.

[0013] For an insertable composite material co-effective connection structure as described above, the radial pressure of the tightening member is 0.8 - 0.9 of the bonding strength of the adhesive, and the tightening member is bonded to the adhesive.

[0014] An insertable composite material co - effect connection structure as described above, the inner diameters at both ends of the connecting sleeve are greater than the inner diameter of the middle section of the connecting sleeve, the adhesive is filled in the middle section of the connecting sleeve, and the length of the middle section of the connecting sleeve is greater than the length of the end of the connecting sleeve;

[0015] Reinforcing layers are circumferentially arranged at both ends of the connecting sleeve to improve the rigidity of the ends of the connecting sleeve, avoid excessive deformation at both ends of the connecting sleeve when the expansion member expands, and avoid tearing the bonding area.

[0016] An insertable composite material co - effect connection structure as described above, the mandrel is made of composite material or metal material, and the connecting sleeve is made of composite material or metal material.

[0017] In a second aspect, the present invention also provides an insertable composite material co - effect connection method, which uses the insertable composite material co - effect connection structure described above and includes the following steps:

[0018] Insert the mandrel into the connecting sleeve;

[0019] Squeeze the adhesive into one end of the connecting sleeve and push the adhesive inward until the adhesive overflows from the other end of the connecting sleeve, so that the middle section of the connecting sleeve and the mandrel are bonded through the adhesive;

[0020] Install the expansion member at both ends of the connecting sleeve. The conical part squeezes the inner expansion sleeve inward and the outer expansion sleeve outward, so that the ends of the connecting sleeve and the mandrel are connected by expansion.

[0021] In an insertable composite material co - effect connection method as described above, before inserting the mandrel into the connecting sleeve, heat the connecting sleeve to make it expand.

[0022] In an insertable composite material co - effect connection method as described above, after squeezing the adhesive into one end of the connecting sleeve, use a glue - pushing member to push the adhesive inward;

[0023] The glue - pushing member includes a main body part. One end of the main body part is provided with a flexible part. The inner diameter of the flexible part is adapted to the diameter of the mandrel, the outer diameter of the flexible part is adapted to the inner diameter of the end of the connecting sleeve, the height of the main body part is adapted to the depth of the end of the connecting sleeve, and a bent end is provided at the end of the main body part away from the flexible part so that one end of the main body part is exposed outside the end of the connecting sleeve.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1) The present invention sets a synergistic connection structure, and sets a tightening member at the end of the connecting sleeve. The end of the connecting sleeve and the core shaft are stably connected by the tightening member. The whole is coordinated by gluing and tightening to play a synergistic role. The two connection methods play a main connecting role together and play a role of protective structure for each other. There is no need to set embedded parts at the core shaft or the connecting sleeve as a whole, so as to avoid the generation of cracks between materials, exponentially improve the connection strength, and improve the safe service life.

[0026] 2) The expansion member structure of the present invention is reasonably arranged, and the expansion member comprises an inner expansion sleeve and an outer expansion sleeve, and a first cone ring and a second cone ring are arranged between the inner expansion sleeve and the outer expansion sleeve, and the first cone ring and the second cone ring are connected by a plurality of connecting parts. During the tightening process of the connecting parts, the first cone ring and the second cone ring move towards each other, so that the outer expansion sleeve expands and the inner expansion sleeve contracts, and the contact parts of the first cone ring, the second cone ring and the outer expansion sleeve and the inner expansion sleeve generate a large friction force, thereby forming a tight connection, thereby realizing the expansion connection between the end of the connecting sleeve and the core shaft.

[0027] 3) The functional connection method provided by the present invention uses expansion connection and gluing in combination. The gluing is done in the middle section of the connection sleeve to effectively shorten the gluing distance. The two ends of the connection sleeve are expanded by expansion components. The expansion components at the ends are not only convenient for processing, but also amplify the gluing effect. The expansion and gluing are combined to effectively ensure the stability and reliability of the composite material connection. The use of a glue pushing component during the gluing process makes the adhesive more uniform, improves the bonding efficiency and quality stability, and avoids redundant design.

[0028] 4) In the functional connection method of the present invention, a rubber pushing component is used to push the adhesive, so that the adhesive can quickly enter between the connecting sleeve and the core shaft, effectively apply pressure to the bonding surface, improve the bonding efficiency, increase the effective bonding area to more than 95%, and make the adhesive evenly distributed between the connecting sleeve and the core shaft, ensuring the reliability of the bonding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 It is a schematic diagram of a rubber pushing member provided at the end of a connecting sleeve in an insert-type composite material synergistic connection structure according to one or more embodiments of the present invention.

[0031] Figure 2 It is a cross-sectional schematic diagram of an inserted composite material co-effective connection structure according to one or more embodiments of the present invention.

[0032] Figure 3It is a schematic cross-sectional view of a swelling member in an insertable composite material co-effect connection structure according to one or more embodiments of the present invention.

[0033] Figure 4 It is a top view of a swelling member in an insertable composite material co-effect connection structure according to one or more embodiments of the present invention.

[0034] Figure 5 It is a schematic view of a glue-pushing member in an insertable composite material co-effect connection structure according to one or more embodiments of the present invention.

[0035] In the figure: The distances or sizes between each part are exaggerated for showing the positions of each part, and the schematic view is only for illustration.

[0036] Wherein: 1. Mandrel, 2. Connecting sleeve, 3. Reinforcing layer, 4. Glue-bonding area, 5. Glue-pushing member, 6. Swelling member, 5-1. Main body member, 5-2. Flexible member, 6-1. Outer swelling sleeve, 6-2. Inner swelling sleeve, 6-3. First conical ring, 6-4. Second conical ring, 6-5. Connecting member. Detailed implementation manners

[0037] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0038] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0039] As introduced in the background art, the connection method of composite materials in the prior art requires embedding metal parts, and the embedded metal parts are likely to cause cracks between composite materials. In severe cases, the composite materials need to be replaced, resulting in an increase in cost. To solve the above technical problems, the present invention proposes an insertable composite material co-effect connection structure.

[0040] Embodiment 1

[0041] In a typical embodiment of the present invention, refer to Figure 1 and Figure 2As shown in the figure, an insertable composite material co-effective connection structure includes a mandrel 1. The mandrel 1 is inserted into a connecting sleeve 2. An adhesive is filled between the connecting sleeve 2 and the mandrel 1. A tightening member 6 is provided at the end of the connecting sleeve 2. The tightening member 6 is arranged between the mandrel 1 and the connecting sleeve 2. The tightening member 6 includes an inner expanding sleeve 6-2 and an outer expanding sleeve 6-1. A hollow part is formed between the inner expanding sleeve 6-2 and the outer expanding sleeve 6-1. A conical member is arranged in the hollow part. The conical member squeezes the inner expanding sleeve 6-2 inward and the outer expanding sleeve 6-1 outward through the friction force between the conical member and the inner expanding sleeve 6-2 and the outer expanding sleeve 6-1 to cooperate with the adhesive to realize the stable connection between the mandrel and the connecting sleeve.

[0042] It is easily understood that, to ensure the stable connection between the mandrel 1 and the connecting sleeve 2, tightening members 6 are provided at both ends of the connecting sleeve 2. Specifically, steps are respectively provided at both ends of the connecting sleeve 2 to form a diameter-expanded section. The inner diameter of the diameter-expanded sections at both ends of the connecting sleeve 2 is larger than the inner diameter of the middle section of the connecting sleeve 2. The inner diameter of the middle section of the connecting sleeve 2 is larger than the diameter of the mandrel 1. A bonding area 4 is formed between the middle section of the connecting sleeve 2 and the mandrel 1 for filling the adhesive. The adhesive is filled in the middle section of the connecting sleeve 2. The length of the middle section of the connecting sleeve 2 is larger than the length of the diameter-expanded sections at the ends of the connecting sleeve. The sum of the lengths of the diameter-expanded sections at both ends is smaller than the length of the middle section of the connecting sleeve 2. In this way, the tightening members 6 are arranged at both ends of the connecting sleeve 2, and the tightening structure is located outside the bonding structure. The two connection structures cooperate with each other to jointly play a connecting role and play a role in protecting the whole;

[0043] In this embodiment, the end of the adhesive contacts and bonds with the tightening member 6, so that the adhesive is connected to the tightening member, further ensuring the stable connection between the connecting sleeve 2 and the mandrel 1.

[0044] Among them, it should be noted that the mandrel 1 is made of composite material or metal material, and the connecting sleeve 2 is made of composite material or metal material.

[0045] Reference Figure 3 and Figure 4 As shown in the figure, the conical member includes a first conical ring 6-3 and a second conical ring 6-4. The first conical ring 6-3 and the second conical ring 6-4 are arranged oppositely. The structures of the first conical ring 6-3 and the second conical ring 6-4 are the same. The second conical ring 6-4 is arranged close to the middle section of the connecting sleeve 2. The first conical ring 6-3 and the second conical ring 6-4 are connected by a plurality of connecting members 6-5. During the tightening process of the connecting members 6-5, the first conical ring and the second conical ring move towards each other, causing the outer expanding sleeve to expand and the inner expanding sleeve to contract. A large friction force is generated at the contact parts between the first conical ring, the second conical ring and the outer expanding sleeve and the inner expanding sleeve, forming a tight connection.

[0046] It is easily understood that, to ensure the tightening effect, the inner expanding sleeve 6-2 and the outer expanding sleeve 6-1 are respectively adapted to the first conical ring 6-3 and the second conical ring 6-4 through conical surfaces to ensure the extrusion effect on the outer expanding sleeve and the inner expanding sleeve.

[0047] Specifically, the outer side surface of the inner expansion sleeve is provided with an inclined surface, and the inner side surface of the outer expansion sleeve is provided with an inclined surface, so that the hollow part between the inner expansion sleeve and the outer expansion sleeve includes a first tapered ring hole, a circular ring hole, and a second tapered ring hole that are sequentially connected. The taper of the first tapered ring hole is the same as that of the first tapered ring 6-3, and the taper of the second tapered ring hole is the same as that of the second tapered ring 6-4. The first tapered ring hole and the second tapered ring hole are arranged oppositely. The first tapered ring is arranged at the first tapered ring hole, the second tapered ring is arranged at the second tapered ring hole, and a spacing distance is set between the first tapered ring and the second tapered ring.

[0048] It should be explained that the inner surface of the inner expansion sleeve 6-2 is fitted with the mandrel 1, and the outer expansion sleeve 6-1 is fitted with the inner surface of the expanded diameter section of the connecting sleeve. Both the inner expansion sleeve 6-2 and the outer expansion sleeve 6-1 are made of polyurethane-based composite materials. The inner expansion sleeve and the outer expansion sleeve are both non-closed structural parts. The polyurethane-based composite material has a high elongation at break and can provide a large compression amount.

[0049] There are multiple connecting pieces 6-5, and a set angle is set between adjacent two connecting pieces. The stable connection of the first tapered ring and the second tapered ring is ensured by the arrangement of the multiple connecting pieces.

[0050] Considering the structural arrangement, the connecting piece 6-5 is a screw. The first tapered ring 6-3 is provided with a through hole, and the through hole can be a counterbore. The second tapered ring 6-4 is provided with a threaded hole. The screw passes through the through hole and is fastened in the threaded hole, which is convenient for the rapid setting of the connecting piece, ensures the connection stability of the first tapered ring and the second tapered ring, and provides a force to the outer expansion sleeve and the inner expansion sleeve.

[0051] It should be noted that the tightening force of the tightening member 6 is adapted according to the different bonding strengths of the adhesive. The adaptation principle is that the radial pressure of the tightening member is 0.8-0.9 of the bonding strength of the adhesive, and the overall structural strength is relatively high;

[0052] Since the composite material is an anisotropic material, it has more advantages in using the tightening member for connection compared with isotropic metal materials. Reinforcing layers are arranged circumferentially at both ends (of the expanded diameter section) of the connecting sleeve 2. The reinforcing layer adopts a circumferential fiber layer, and specifically, carbon fiber can be used. The reinforcing layer has been set as an integral structure during the forming process of the connecting sleeve. The reinforcing layer improves the rigidity of the ends of the connecting sleeve, avoids excessive deformation at both ends of the connecting sleeve when the tightening member 6 is tightened, and avoids tearing the bonding area; the bending rigidity of the cross-section of the connecting sleeve is enhanced through the circumferential fiber layer. In addition, the material modulus is relatively lower than that of steel, but the strength can be more than twice higher. When using the tightening member for connection, it can provide a larger micro-deformation and improve the connection strength.

[0053] The co-effective connection structure provided by this embodiment has a reinforcing layer at the end of the connecting sleeve, which improves the overall rigidity, simplifies the connection form, and enhances the connection stability. A tightening member is provided at the end of the connecting sleeve, and the stable connection between the end of the connecting sleeve and the mandrel is achieved through the tightening member. The overall structure is combined with bonding and tightening methods to play a co-effective role. The two connection methods jointly play a major connection role and protect each other's structures, exponentially increasing the connection strength and extending the safe service life.

[0054] Embodiment 2

[0055] This embodiment provides an insertion-type composite material co-effective connection method, which adopts an insertion-type composite material co-effective connection structure described in Embodiment 1 and includes the following steps:

[0056] The corresponding outer and inner surfaces of the mandrel 1 and the connecting sleeve 2 are respectively subjected to surface treatments such as physical or chemical methods to improve the bonding strength, and then the mandrel is inserted into the connecting sleeve.

[0057] A sufficient amount of adhesive is squeezed into one end of the connecting sleeve 2, and the adhesive is pushed inward so that the adhesive is pushed into the bonding area until the adhesive overflows from the other end of the connecting sleeve 2, enabling the middle section of the connecting sleeve 2 to be bonded to the mandrel 1 through the adhesive.

[0058] The tightening members 6 are installed at both ends of the connecting sleeve 2. The conical member squeezes the inner expansion sleeve inward and the outer expansion sleeve outward, so that the end of the connecting sleeve is connected to the mandrel by means of tightening.

[0059] Among them, before inserting the mandrel 1 into the connecting sleeve 2, the connecting sleeve 2 is heated to make it expand. Specifically, the connecting sleeve is placed in an oven at 60 °C for 20 minutes to make the connecting sleeve expand slightly, and then the mandrel is inserted concentrically.

[0060] In this embodiment, after squeezing the adhesive into one end of the connecting sleeve, a glue-pushing member is used to push the adhesive inward until the adhesive overflows from the other end. Then, the glue-pushing member 5 is taken out, and the excess adhesive in the non-bonding area is wiped off.

[0061] Reference Figure 5 As shown, the glue-pushing member 5 includes a main body member 5-1. The main body member 5-1 is an annular member, which can be made of metal material to provide rigid support for the glue-pushing member and ensure that the adhesive can be stably pushed to migrate. The inner diameter of the main body member 5-1 is larger than the diameter of the mandrel 1, and the outer diameter of the main body member 5-1 entering the end of the connecting sleeve is smaller than the inner diameter of the end of the connecting sleeve (the expanded diameter section), avoiding contact between the main body member and the mandrel and the inside of the connecting sleeve, and facilitating the application of external forces.

[0062] A flexible member 5-2 is provided at one end of the main body member. The flexible member 5-2 is also an annular member and can be sleeved on the circumferential direction of the mandrel 1. The flexible member 5-2 can be made of silica gel to provide a sealing function. The inner diameter of the flexible member 5-2 is slightly smaller than the diameter of the mandrel, and the outer diameter of the flexible member 5-2 is slightly larger than the inner diameter of the enlarged diameter section at the end of the connecting sleeve. The height of the main body member is greater than or equal to the depth of the end of the connecting sleeve. A bent end is provided at the end of the main body member away from the flexible member so that one end of the main body member is exposed outside the end of the connecting sleeve. After the glue pushing member is pushed into the enlarged diameter section of the connecting sleeve, the glue pushing member is gradually pushed so that the end of the tightening member contacts the step of the connecting sleeve, so that the adhesive is injected into the middle section of the connecting sleeve and discharged from the other end of the connecting sleeve.

[0063] In this way, for the method provided in this embodiment, the combined use of tightening connection and bonding and the uniform adhesive layer effectively shorten the bonding distance, improve the bonding efficiency and quality stability, avoid redundant design. Through the setting of the glue pushing member, the adhesive can be made more uniform, and the overall bonding distance is effectively shortened, and the bonding efficiency and quality stability are improved.

[0064] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An insertable composite material co-effective connection structure, characterized in that, It includes a mandrel which is inserted into a connecting sleeve. An adhesive is filled between the connecting sleeve and the mandrel. A tightening member is arranged at the end of the connecting sleeve and is located between the mandrel and the connecting sleeve. The tightening member includes an inner expansion sleeve and an outer expansion sleeve. A hollow part is formed between the inner expansion sleeve and the outer expansion sleeve. A conical member is arranged in the hollow part. The conical member inwardly presses the inner expansion sleeve and outwardly presses the outer expansion sleeve through the frictional force between the conical member and the inner expansion sleeve and the outer expansion sleeve to cooperate with the adhesive to achieve the stable connection between the mandrel and the connecting sleeve.

2. The insertable composite material co-effect connection structure according to claim 1, characterized in that, The conical member includes a first conical ring and a second conical ring which are arranged oppositely. The first conical ring and the second conical ring are connected by a plurality of connecting members.

3. The plug-in composite material co-effect connection structure according to claim 2, characterized in that, The connecting members are screws. The first conical ring is provided with through holes, and the second conical ring is provided with threaded holes. The screws pass through the through holes and are fastened in the threaded holes.

4. The plug-in composite material co-effect connection structure according to claim 2, characterized in that, The inner expansion sleeve and the outer expansion sleeve are respectively adapted to the first conical ring and the second conical ring through conical surfaces; The hollow part between the inner expansion sleeve and the outer expansion sleeve includes a first conical ring hole, a circular ring hole and a second conical ring hole which are connected in sequence. The first conical ring hole and the second conical ring hole are arranged oppositely.

5. An insertable composite material co-effect connection structure according to claim 1, characterized in that, The radial pressure of the tightening member is 0.8 - 0.9 of the bonding strength of the adhesive, and the tightening member is bonded to the adhesive.

6. The insertable composite material co-effect connection structure according to claim 1, wherein The inner diameters of both ends of the connecting sleeve are larger than the inner diameter of the middle section of the connecting sleeve. The adhesive is filled in the middle section of the connecting sleeve, and the length of the middle section of the connecting sleeve is greater than the length of the end of the connecting sleeve; Reinforcing layers are arranged circumferentially at both ends of the connecting sleeve.

7. The insertable composite material co-effect connection structure according to claim 1, characterized in that, The mandrel is made of composite material or metal material, and the connecting sleeve is made of composite material or metal material.

8. An insertable composite material co-effect connection method, characterized in that, An insert type composite material co - effect connection structure according to any one of claims 1 - 7 includes the following: Insert the mandrel into the connecting sleeve; Squeeze the adhesive into one end of the connecting sleeve and push the adhesive inward until the adhesive overflows from the other end of the connecting sleeve, so that the middle section of the connecting sleeve and the mandrel are bonded through the adhesive; Install the tightening member at both ends of the connecting sleeve. The conical member inwardly presses the inner expansion sleeve and outwardly presses the outer expansion sleeve, so that the end of the connecting sleeve and the mandrel are connected in a tightened manner.

9. The plug-in composite material co-effect connection method according to claim 8, characterized in that, Before inserting the mandrel into the connecting sleeve, heat the connecting sleeve to make it expand.

10. A plug-in composite material co-effect connection method according to claim 8, characterized in that, After squeezing the adhesive into one end of the connecting sleeve, use a glue - pushing member to push the adhesive inward; The glue - pushing member includes a main body member. One end of the main body member is provided with a flexible member. The inner diameter of the flexible member is adapted to the diameter of the mandrel, the outer diameter of the flexible member is adapted to the inner diameter of the end of the connecting sleeve, the height of the main body member is adapted to the depth of the end of the connecting sleeve, and a bent end is arranged at the end of the main body member away from the flexible member so that one end of the main body member is exposed outside the end of the connecting sleeve.

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