Composite material thin radial plate gear based on lightweight design and preparation method of composite material thin radial plate gear

Abstract

The invention discloses a composite material thin radial plate gear based on lightweight design and a preparation method of the composite material thin radial plate gear. The gear comprises a rim, a hub, and a composite material radial plate and an adhesive which are used for connecting the rim and the hub. The rim is of a circular ring structure, and a plurality of lugs I are arranged on the inner circumference of a circular ring at intervals. The hub is of a hollow cylinder structure with the two ends open, and a plurality of lugs II are arranged on the outer side wall of the cylinder at intervals. The composite radial plate is a laminated plate, the laminated plate is formed by stacking and extruding multiple layers of carbon fiber prepregs and is of a disc-shaped structure with a through hole in the center, a plurality of side edge grooves I are formed in the outer circumference of the disc at intervals, and a plurality of side edge grooves II are formed in the inner circumference of the disc along the side wall of the through hole at intervals. The convex lug I and the convex lug II are embedded into the side edge groove I and the side edge groove II respectively, and the space between the convex lug and the side edge groove is filled with a composite material adhesive. The lightweight level, the vibration and noise reduction performance and the interface reliability of the gear are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical transmission component manufacturing, in particular to a composite material thin-webbed plate gear based on lightweight design and a preparation method thereof. BACKGROUND

[0002] Gear transmission is the most widely used power transmission mode in mechanical systems, and its performance directly determines the reliability, energy efficiency level and working environment adaptability of the equipment. Although traditional metal gears have high bearing capacity, they are generally heavy, have significant vibration and noise, and other problems due to the limitations of material density and structural design. Especially in high-end fields such as aerospace and new energy vehicles, the demand for lightweight of gear systems is increasing, and vibration and noise reduction has become a core bottleneck restricting technological breakthroughs.

[0003] The existing technology still faces significant challenges in the coordinated optimization of lightweight and vibration and noise reduction: on the one hand, simply using lightweight materials such as aluminum alloy and engineering plastic can reduce weight, but the insufficient material stiffness can lead to tooth surface contact stress concentration, thereby exacerbating vibration and noise; on the other hand, when traditional metal gears improve noise through tooth shape modification or damping coating, the transmission accuracy is often sacrificed or the manufacturing cost is increased. The introduction of composite materials provides a new idea for gear lightweighting. Carbon fiber reinforced resin-based composite materials have a density of only 1 / 4-1 / 3 of metal and excellent specific stiffness and damping properties, but the insufficient interfacial bonding strength and large difference in thermal expansion coefficient between the metal parts and the composite materials lead to stress concentration and fretting wear in the connection area, thereby affecting the vibration reduction effect. Some scholars have proposed a design method that combines a buckle-type groove with a composite material web, but this method relies too much on the adhesive layer, and long-term use can lead to interface peeling due to thermal stress or vibration. Some experts in the gear field have proposed a vibration monitoring method for intelligent composite material gears using piezoelectric nanoparticles, but this method does not combine with mechanical interlocking structures, and the vibration reduction effect depends on the material itself, which has poor adaptability to high load conditions. The existing lightweight and vibration reduction design of gear systems focuses on the optimization of single components, lacks coordinated innovation from the material-structure-process chain, and is difficult to achieve integrated breakthroughs in lightweight and low noise. SUMMARY

[0004] The purpose of the present application is to provide a composite material thin-webbed plate gear based on lightweight design, which comprises a metal base, a composite material web and a composite material adhesive.

[0005] The metal base comprises a rim and a hub, and the rim and the hub are connected by the composite material web and the composite material adhesive.

[0006] The rim is a circular ring structure, and a plurality of lugs I are arranged on the inner circumference of the circular ring in intervals.

[0007] The hub is a hollow cylinder structure with open ends, and a plurality of lugs II are arranged on the outer side wall of the cylinder in a spaced manner.

[0008] The composite spoke is a laminated plate, which is formed by stacking and extruding a plurality of carbon fiber prepregs, and has a disc structure with a through hole in the center.

[0009] A plurality of side grooves I are arranged on the outer circumference of the laminated plate in a spaced manner, and a plurality of side grooves II are arranged on the inner circumference along the side wall of the through hole in a spaced manner.

[0010] The lug I is embedded in the side groove I, and the lug I and the side groove I are filled with a composite adhesive.

[0011] The lug II is embedded in the side groove II, and the lug II and the side groove II are filled with a composite adhesive.

[0012] Further, the composite spoke is formed by stacking T300 carbon fiber plain weave prepregs, injecting epoxy resin in a vacuum environment, and curing and forming by temperature gradient method after injection.

[0013] Further, the composite spoke uses a vacuum assisted forming process, uses a multi-stage vacuum strategy, and optimizes the resin infiltration path by controlling the vacuum degree in stages.

[0014] Further, the lay-up method of the composite spoke is orthogonal lay-up or multi-angle symmetric lay-up.

[0015] Further, the shear strength between adjacent layers of the composite spoke is ≥70MPa, and the fiber direction of the outermost layer is 0°, which is in the same straight line with the tangent direction of the gear pitch circle.

[0016] Further, the lug I is a protruding structure starting from the inner circumferential surface of the rim and extending radially along the rim, which includes a fixed section connected with the rim, a middle section with a contraction on both sides, and an expanding section.

[0017] The two side walls of the middle section are symmetrical inner arc surfaces, and a strip flange I is arranged on the side wall at the position of the minimum distance between the two side walls.

[0018] The two side walls of the middle section close to the expanding section are symmetrical outer arc surfaces, and the end is closed and connected by an outer convex arc surface.

[0019] A strip flange II is arranged at the center position of the end of the expanding section away from the rim.

[0020] The outer contour of the lug I is matched with the side groove I.

[0021] The lug II is a protruding structure starting from the outer circumferential surface of the hub and extending radially along the hub, and the end is an outer arc surface.

[0022] The outer contour of the lug II is matched with the side slot II.

[0023] Further, the lug I and the lug II are respectively matched with the side slot I and the side slot II.

[0024] The matching is realized by a hot fitting process: the deformation amount of the lug I and the lug II is controlled by controlling the temperature during the assembly process.

[0025] Further, the manufacturing material of the composite material web plate comprises carbon fibers and at least one of a resin-based composite material, a metal-based composite material and a ceramic-based composite material.

[0026] Further, the composite material adhesive is at least one of an inorganic non-metallic material adhesive, a metal-based adhesive and a ceramic-based adhesive.

[0027] Another object of the present application is to provide a preparation method of a composite material thin web plate gear based on lightweight design, comprising the following steps:

[0028] S1, based on the equipment structure, the size of the gear is determined to prepare a rim and a hub; the rim comprises a lug I, and the hub comprises a lug II;

[0029] S2, the carbon fiber prepreg is processed to include a center through hole, a side slot I and a side slot II, and the carbon fiber prepreg is cut by using an automatic blanking machine to form a web plate preform;

[0030] S3, the web plate preform is stacked according to a preset stacking sequence, the stacked body is loaded into a vacuum bag, a multi-stage vacuuming strategy is adopted, the resin penetration path is optimized by controlling the vacuum degree in stages, and the composite material web plate is formed after demolding after gradient temperature curing;

[0031] S4, after curing, the lug I and the lug II are subjected to surface texturing treatment and strengthening processing;

[0032] S5, based on the hot fitting process, the lug I and the lug II are respectively embedded into the side slot I and the side slot II of the composite material web plate to form a mechanical engagement structure, and epoxy resin is uniformly applied at the engagement position;

[0033] S6, pressure is applied to the engagement structure, and a gradient temperature curing is performed to form an epoxy resin bonding layer, so as to complete the preparation of the composite material thin web plate gear.

[0034] The technical effect of the present application is self-evident, and the beneficial effects of the present application are as follows:

[0035] 1, the composite material web plate of the present application reduces the overall weight of the gear by 30%-50% while maintaining high specific stiffness characteristics;

[0036] 2、The gradient curing resin of the application cooperates with the microstructure (lug) interface to inhibit vibration transmission, and the noise is reduced by 20%-30%;

[0037] 3、The mechanical interlocking connection formed by the lug and the side slot and the composite adhesive forming the gradient crosslinking network significantly improve the interface bonding strength, effectively prolonging the service life of the gear;

[0038] 4、The composite spoke of the application is prepared based on a vacuum assisted forming process, which can adapt to complex structures and support mass production. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of a composite thin spoke gear in an embodiment of the application;

[0040] Figure 2 It is a sectional schematic diagram of a composite thin spoke gear in an embodiment of the application;

[0041] Figure 3 It is an exploded view of a composite thin spoke gear in an embodiment of the application.

[0042] In the figure: rim 1, lug I 101, composite spoke 2, through hole 201, side slot I 202, side slot II 203, hub 3, lug II 301, hub keyway 302. DETAILED DESCRIPTION

[0043] The application will be further described below in conjunction with the embodiments, but should not be understood as limiting the above-mentioned subject matter of the application to the following embodiments. According to ordinary technical knowledge and conventional means in the art, various substitutions and modifications can be made without departing from the above-mentioned technical idea of the application, and all should be included in the protection scope of the application.

[0044] Example 1:

[0045] A composite thin spoke gear based on lightweight design, comprising a metal base, a composite spoke 2 and a composite adhesive.

[0046] The metal base comprises a rim 1 and a hub 3, and the rim 1 and the hub 3 are connected by the composite spoke 2 and the composite adhesive.

[0047] The rim 1 is a circular ring structure, and the outer circumference of the circular ring is distributed with gear teeth, and the inner circumference is provided with a plurality of lugs I 101 at intervals, and the lug I 101 is an integral molding structure with the rim 1.

[0048] The hub 3 is a hollow cylinder structure with open ends, and a plurality of lugs 301 are arranged on the outer side wall of the cylinder in a spaced manner.

[0049] The composite spoke 2 is a laminated plate formed by stacking and extruding a plurality of carbon fiber prepreg layers, and has a disc structure with a through hole 201 in the center.

[0050] A plurality of side grooves 202 are arranged on the outer circumference of the laminated plate in a spaced manner, and a plurality of side grooves 203 are arranged on the inner circumference along the side wall of the through hole 201 in a spaced manner.

[0051] The lug 101 is embedded in the side groove 202, and a composite adhesive is filled between the lug 101 and the side groove 202.

[0052] The lug 301 is embedded in the side groove 203, and a composite adhesive is filled between the lug 301 and the side groove 203.

[0053] Example 2:

[0054] The main structure of this embodiment is the same as that of example 1, and further, the composite spoke 2 is stacked by T300 carbon fiber plain weave prepreg, and then epoxy resin is injected in a vacuum environment, and after injection, a temperature gradient method is used for curing and forming.

[0055] Example 3:

[0056] The main structure of this embodiment is the same as that of example 2, and further, the composite spoke 2 uses a vacuum assisted forming process, uses a multi-stage vacuum strategy, and optimizes the resin infiltration path through stage vacuum degree control.

[0057] Example 4:

[0058] The main structure of this embodiment is the same as that of any one of examples 1-3, and further, the lay-up method of the composite spoke 2 is orthogonal lay-up or multi-angle symmetric lay-up.

[0059] Example 5:

[0060] The main structure of this embodiment is the same as that of any one of examples 1-4, and further, the shear strength between adjacent layers of the composite spoke 2 is ≥70MPa, and the fiber direction of the outermost layer is 0°, which is on the same straight line with the tangent direction of the gear pitch circle.

[0061] Example 6:

[0062] The main structure of the embodiment is the same as any one of embodiments 1-5, and further, the lug 101 is a protruding structure starting from the inner circumferential surface of the rim 1 and extending radially along the rim 1, and sequentially comprises a fixed section connected with the rim 1, a middle section with both sides being in a constricted shape, and an expanding section.

[0063] The two side walls of the middle section are symmetrical inner arc surfaces, and a strip-shaped flange I is arranged on the side wall at the position of the minimum spacing between the two side walls.

[0064] The two side walls of the middle section are symmetrical inner arc surfaces, and a strip-shaped flange I is arranged on the side wall at the position of the minimum spacing between the two side walls.

[0065] The two side walls of the middle section are symmetrical inner arc surfaces, and a strip-shaped flange I is arranged on the side wall at the position of the minimum spacing between the two side walls.

[0066] The setting direction of the flange I and the flange II is parallel to the thickness direction of the rim 1

[0067] The outer contour of the lug 101 is matched with the side groove 202.

[0068] The lug 301 is a protruding structure starting from the outer circumferential surface of the hub 3 and extending radially along the hub 3, and the end is an outer arc surface.

[0069] The outer contour of the lug 301 is matched with the side groove 203.

[0070] Embodiment 7:

[0071] The main structure of the embodiment is the same as any one of embodiments 1-6, and further, the number and position of the lug 101 correspond to the number and position of the side groove 202.

[0072] The number and position of the lug 301 correspond to the number and position of the side groove 203.

[0073] Embodiment 8:

[0074] The main structure of the embodiment is the same as any one of embodiments 1-7, and further, the lug 101 and the lug 301 are respectively in interference fit with the side groove 202 and the side groove 203.

[0075] The interference fit is realized by a hot mounting process: the deformation amount of the lug 101 and the lug 301 is controlled by controlling the temperature during assembly.

[0076] Embodiment 9:

[0077] The main structure of the embodiment is the same as any one of embodiments 1-8, and further, the manufacturing material of the composite spoke 2 comprises carbon fibers, and further comprises at least one of a resin-based composite material, a metal-based composite material, and a ceramic-based composite material.

[0078] Embodiment 10:

[0079] The main structure of this embodiment is the same as any one of Embodiments 1-9, and further, the composite material adhesive is at least one of an inorganic non-metallic material adhesive, a metal-based adhesive, and a ceramic-based adhesive.

[0080] Embodiment 11:

[0081] The main structure of this embodiment is the same as any one of Embodiments 1-10, and further, a key groove 302 is processed at the inner ring of the hub 3 to connect with the transmission shaft.

[0082] Embodiment 12:

[0083] The main structure of this embodiment is the same as any one of Embodiments 1-11, and further, a composite material thin-webbed gear includes:

[0084] A metal base including a rim and a hub, and the rim and the hub are connected through a composite material web transition area.

[0085] A composite material web made of a T300 carbon fiber plain weave prepreg laminate, and the laminate is formed into a multi-layer orthogonal layup structure through a vacuum assisted forming process.

[0086] A mechanical interlocking connection structure, in which the circumferentially distributed metal claw ears and the composite material web are bonded and fixed through a mechanical connection structure and a gradient curing epoxy adhesive layer.

[0087] Further, the metal base and the composite material web are connected through the claw-shaped lugs on the rim and the hub and the composite material web through an interference fit, and the lugs are distributed in a circular array.

[0088] Further, the surface of the claw-shaped lugs of the metal base is provided with a microstructure generated by a physical or chemical surface treatment process, and forms a mechanical interlock with the composite material web.

[0089] Further, a key groove is processed at the inner ring of the metal hub to connect with the transmission shaft.

[0090] Further, the surface and side surface of the claw-shaped lugs of the metal base are bonded and fixed with the composite material web through an adhesive layer

[0091] Further, the carbon fiber layup adopts a multi-angle symmetric layup sequence, the interlaminar shear strength is ≥70 MPa, and the 0° fiber direction of the outermost layer coincides with the tangent direction of the gear pitch circle.

[0092] Further, the interference fit connection is realized through a hot assembly process, and the predetermined deformation amount is accurately controlled through temperature control during assembly.

[0093] Further, the vacuum assisted molding process adopts a multi-stage vacuum extraction strategy to optimize the resin infiltration path through staged vacuum level control.

[0094] Further, the composite material web manufacturing material is at least one of resin-based composite material, metal-based composite material, and ceramic-based composite material.

[0095] Further, the composite material adhesive is at least one of inorganic non-metallic material adhesive, metal-based adhesive, and ceramic-based adhesive.

[0096] Embodiment 13:

[0097] A preparation method of a composite material thin web gear based on the lightweight design according to any one of embodiments 1-12, comprising the following steps:

[0098] S1, based on the equipment structure, determine the size of the gear to manufacture the rim 1 and the hub 3; the rim 1 includes lug I 101, and the hub 3 includes lug II 301;

[0099] S2, process the carbon fiber prepreg, including a center through hole 201, a side slot I 202, and a side slot II 203, use an automatic cutting machine to cut the carbon fiber prepreg to form a web preform;

[0100] S3, stack the web preform in the mold according to the preset layering sequence, then put the mold with the stacked body into a vacuum bag, and lay a vacuum pipeline in the vacuum bag;

[0101] Based on the multi-stage vacuum extraction strategy, inject epoxy resin into the mold through the vacuum pipeline, after the epoxy resin injection is completed and the web preform is fully infiltrated, perform gradient heating; after gradient heating and curing, demold to form a composite material web 2;

[0102] S4, after curing, perform surface texturing treatment and strengthening processing on the lug I 101 and the lug II 301, perform laser processing on the contact position of the lug I 101 and the lug II 301 with the composite material web 2 to form a micro-pit array, and perform laser impact processing on the root of the lug I 101 and the lug II 301 to form a residual compressive stress layer with a depth of 0.1-0.2mm;

[0103] S5, based on the hot fitting process, embed the lug I 101 and the lug II 301 into the side slot I 202 and the side slot II 203 of the composite material web 2 respectively to form a mechanical interlocking structure, and uniformly apply epoxy resin at the interlocking position;

[0104] S6, applying 5-8 MPa pressure for 10 min, and gradient temperature curing to form an epoxy resin bonding layer to complete the preparation of the composite thin-webbed gear.

[0105] Embodiment 14:

[0106] A preparation method of a composite thin-webbed gear based on the lightweight design according to any one of embodiments 1-13, comprising the following steps:

[0107] 1) Preforming step: using an automatic cutting machine to accurately cut the carbon fiber prepreg to form a web preform;

[0108] 2) Gradient curing step: injecting an epoxy resin system in a vacuum environment, and using a multi-stage temperature system to realize gradient crosslinking of the resin;

[0109] 3) Claw ear preforming step: surface treating the claw ear area of the metal matrix to form a periodically distributed microstructured area;

[0110] 4) Mechanical interlocking assembly step: fitting the preformed web and the claw ear with interference at a temperature of 140-180 DEG C to form a mechanical interlocking structure, and uniformly applying adhesive;

[0111] 5) Post-processing step: applying 5-8 MPa pressure for 10 min, and gradient temperature curing to form an epoxy resin bonding layer to complete the preparation of the composite thin-webbed gear.

[0112] Embodiment 15:

[0113] The main structure of this embodiment is the same as any one of embodiments 1-14, and further, the core of the application is to construct a composite gear structure with mechanical interlocking and gradient functional characteristics by innovative combination of the metal matrix and the composite web, specifically comprising:

[0114] Structural design: the metal matrix (such as 20CrMo alloy) and the carbon fiber composite web are connected by claw ear-web interference fitting to form a mechanical interlocking connection, and the interface stress buffer is realized by combining gradient curing epoxy resin;

[0115] Material system: the carbon fiber is used to enhance the composite web by orthogonal layering, and the surface of the metal claw ear is microstructured to form a periodic mechanical interlocking area;

[0116] Process innovation: vacuum assisted forming process combined with multi-stage gradient curing optimizes the resin infiltration path and crosslinking network, and simultaneously realizes the interface strengthening and damping function.

[0117] Embodiment 16:

[0118] The main structure of the embodiment is the same as any one of embodiments 1-15, and further, a composite thin-webbed gear includes a metal rim 1 and hub 3, and a composite web 2. The metal base is connected to the web with circumferentially distributed claw-shaped lugs 101, 301 for fixing the composite web 2.

[0119] Pre-forming process: using an automatic cutting machine to accurately cut the carbon fiber prepreg to form a web preform.

[0120] Surface treatment: physical / chemical modification of the metal claw lugs to form a periodic microstructure array.

[0121] Assembly process: interference fit of the metal base and the composite web at a specific temperature.

[0122] Curing process: injection of an epoxy resin system in a vacuum environment, using a multi-stage temperature regime to complete gradient crosslinking.

[0123] Example 17:

[0124] The main structure of the embodiment is the same as any one of embodiments 1-16, and further, the present application discloses a lightweight design of a composite thin-webbed gear and a preparation method thereof, belonging to the technical field of mechanical transmission components. In view of the problems of large weight, significant vibration and noise of traditional metal gears, and insufficient bearing capacity of all-composite gears, the present application proposes a composite structure design of a metal base and a carbon fiber reinforced composite material.

[0125] The rim and hub of the gear are made of metal material, and the web is made of carbon fiber reinforced composite material. Interference fit is achieved through mechanical interlocking connection between the metal claw lugs and the composite web, and is supplemented by a gradient curing epoxy resin layer to enhance the interfacial bonding strength. The preparation method includes pre-forming, surface microstructuring, vacuum assisted forming, and multi-stage gradient curing, etc. By optimizing the resin infiltration path and crosslinking network, the lightweight level, vibration and noise reduction performance, and interface reliability of the gear are significantly improved. The gear is suitable for high-end equipment fields such as aerospace and new energy vehicles, and has high transmission efficiency and low energy consumption characteristics.

Claims

1. A composite material thin-spoke gear based on lightweight design, characterized in that: Includes a metal matrix, composite spokes (2), and composite adhesive; The metal matrix includes a rim (1) and a hub (3), and the rim (1) and hub (3) are connected by composite material spokes (2) and composite material adhesive; The rim (1) is a ring-shaped structure, and several lugs I (101) are spaced apart on the inner circumference of the ring; The hub (3) is a cylindrical structure with a hollow interior and open ends. Several lugs II (301) are provided at intervals on the outer side wall of the cylinder. The composite material spokes (2) are laminates, which are formed by extruding multiple layers of carbon fiber prepregs and forming a disc-shaped structure with a through hole (201) in the center. The outer circumference of the laminate is provided with a plurality of side grooves I (202) spaced apart, and the inner circumference is provided with a plurality of side grooves II (203) spaced apart along the side wall of the through hole (201); The lug I (101) is embedded in the side groove I (202), and the lug I (101) and the side groove I (202) are filled with composite material adhesive; The lug II (301) is embedded in the side groove II (203), and the lug II (301) and the side groove II (203) are filled with composite material adhesive.

2. The composite thin-spoke gear based on lightweight design according to claim 1, characterized in that: The composite material spokes (2) are made by stacking T300 carbon fiber plain weave prepreg, injecting epoxy resin in a vacuum environment, and curing it by temperature gradient method after injection.

3. The composite thin-spoke gear based on lightweight design according to claim 2, characterized in that: The composite material spokes (2) are manufactured using a vacuum-assisted molding process and a multi-stage vacuuming strategy. The resin penetration path is optimized by controlling the vacuum level in stages.

4. The composite thin-spoke gear based on lightweight design according to claim 1, characterized in that: The composite material spokes (2) are laid up in an orthogonal layup or a multi-angle symmetrical layup.

5. A composite material thin-spoke gear based on lightweight design according to claim 1, characterized in that: The shear strength between adjacent layers of the composite material spokes (2) is ≥70MPa, and the fiber direction of the outermost layer is 0°, which is on the same straight line as the tangent direction of the gear pitch circle.

6. A composite material thin-spoke gear based on lightweight design according to claim 1, characterized in that: The lug I (101) is a protruding structure that starts from the inner circumferential surface of the rim (1) and extends radially along the rim (1), and includes a fixed section connected to the rim (1), a middle section that is tapered on both sides, and a flared section in sequence. The two side walls of the middle section are symmetrical inner arc surfaces, and the strip flange I is provided on the side wall at the minimum distance between the two side walls; The two side walls of the flared section near the middle section are symmetrical outer arc surfaces, and the ends are closed and connected by an outwardly convex arc surface. The strip flange II is provided at the center of the end of the flared section away from the rim (1); The outer contour of the lug I (101) is adapted to the side groove I (202); The lug II (301) is a protruding structure that starts from the outer circumferential surface of the hub (3) and extends radially along the hub (3), with an outer arc surface at the end; The outer contour of the lug II (301) is adapted to the side groove II (203).

7. A composite material thin-spoke gear based on lightweight design according to claim 1, characterized in that: The lug I (101) and lug II (301) are respectively interference-fitted with the side groove I (202) and the side groove II (203); The interference fit is achieved by a heat fitting process: during the assembly process, the deformation of lug I (101) and lug II (31) is controlled by controlling the temperature.

8. A composite material thin-spoke gear based on lightweight design according to claim 1, characterized in that: The composite material spokes (2) are made of carbon fiber, and at least one of resin-based composite materials, metal-based composite materials and ceramic-based composite materials.

9. A composite material thin-spoke gear based on lightweight design according to claim 1, characterized in that: The composite material adhesive is at least one of inorganic non-metallic material adhesives, metal-based adhesives, and ceramic-based adhesives.

10. A method for preparing a composite material thin-spoke gear based on lightweight design according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Based on the equipment structure, determine the size of the gear to prepare the rim (1) and the hub (3); the rim (1) includes lug I (101), and the hub (3) includes lug II (31); S2. Process the carbon fiber prepreg, including a central through hole (201), side groove I (202) and side groove II (203), and use an automatic feeder to cut the carbon fiber prepreg to form a spoke preform. S3. The prefabricated body of the spoke is stacked in the preset layup sequence, the stack is put into a vacuum bag, a multi-stage vacuuming strategy is adopted, the resin penetration path is optimized by staged vacuum degree control, and the composite material spoke is demolded after gradient temperature curing to form composite material spoke (2). S4. After curing, surface texturing and strengthening processes are carried out on lug I (101) and lug II (301); S5. Based on the hot fitting process, lug I (101) and lug II (301) are respectively embedded into the side groove I (202) and side groove II (203) of the composite material spoke (2) to form a mechanical interlocking structure, and epoxy resin is evenly applied at the interlocking position. S6. Apply pressure to the interlocking structure and perform gradient temperature curing to form an epoxy resin adhesive layer, thereby completing the preparation of the composite material thin-spoke gear.

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