Aviation gear with variable-thickness radial plate

Abstract

The invention belongs to the technical field of gears, and provides an aviation gear with variable radial plate thickness, which comprises a shaft part, a tooth part and a radial plate part, the thickness of a first radial plate part of the radial plate part is smaller than that of an inner ring body part, and the thickness of the joint of the first radial plate part and a second radial plate part is smaller than that of the joint of the second radial plate part and a third radial plate part. The thickness of the joint of the third radial plate part and the second radial plate part is greater than that of the joint of the third radial plate part and the bearing ring body part; the thickness of the joint of the second radial plate part and the first radial plate part and the thickness of the joint of the second radial plate part and the third radial plate part are both smaller than the thickness of the radial middle position of the second radial plate part. According to the aviation gear with the variable radial plate thickness, the groove body is formed in the upper surface of the radial plate part, the weight of the gear is reduced, the thickness of the first radial plate part, the thickness of the second radial plate part and the thickness of the third radial plate part are adjusted and limited, and therefore the overall torsional rigidity of the gear, the vibration characteristic of the gear and the bending strength of the gear are adjusted and controlled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of gear, and particularly relates to an aviation gear with variable thickness of web plate. BACKGROUND

[0002] Gear transmission has the advantages of high transmission efficiency, strong bearing capacity, long service life and compact structure, and is therefore widely used in the power transmission system of an aero-engine. The aviation gear often operates under high speed and high load conditions, resulting in greater stress, more severe deformation and vibration of the gear during service, and therefore the gear transmission performance has a very high requirement. The structure of the gear needs to be optimized to meet the requirements of strength and transmission characteristics, and the weight of the gear needs to be reduced.

[0003] Therefore, many researchers have devoted themselves to the research on the gear topology optimization method to make up for the shortcomings of the existing design. On the one hand, the traditional gear optimization method relies on experience to punch and groove on the web plate structure, and the design method has high cost and low efficiency, or a finite element model is applied to the topology optimization of the web plate structure based on the variable density method, particle swarm optimization algorithm and the like to improve the optimization efficiency. On the other hand, the application of existing commercial software such as OptiStruct, Abaqus and the like to the optimization design can effectively reduce the weight of the gear and achieve the optimization target, but the traditional algorithm cannot fully tap the design potential of the web plate structure.

[0004] At the same time, the current variable thickness design is based on the variable density method, and the thickness of the structure is reasonably designed to achieve better weight reduction effect while meeting the bearing requirement, and a novel structure with more excellent bearing performance is obtained, but the optimization of the gear structure is in a state of deficiency.

[0005] In view of this, it is urgent to overcome the defects of the existing technology in the technical field. SUMMARY

[0006] In view of the above problems, the present application provides an aviation gear with variable thickness of web plate, which comprises an axle part, a tooth part and a web plate part, the axle part is coaxially connected with the web plate part, the tooth part is coaxially connected with the outer ring side wall of the web plate part, and the web plate part comprises an inner ring body part, a first web plate part, a second web plate part, a third web plate part and a supporting ring body part which are sequentially sleeved. The thickness of the first web plate part is smaller than that of the inner ring body part, the thickness of the connection between the first web plate part and the second web plate part is smaller than that of the connection between the second web plate part and the third web plate part, and the thickness of the connection between the third web plate part and the second web plate part is greater than that of the connection between the third web plate part and the supporting ring body part, and the outer ring side wall of the supporting ring body part is coaxially sleeved with the tooth part. The thickness of the connection between the second web plate part and the first web plate part and the thickness of the connection between the second web plate part and the third web plate part are both smaller than the thickness of the second web plate part at the radial middle position.

[0007] Furthermore, the web portion includes an inner ring sidewall, a lower surface, a first outer ring sidewall, a second outer ring sidewall, and an upper surface; The lower surface is a side wall of the spoke portion facing the shaft portion, the lower surface is connected to one side of the first outer ring side wall, the other side of the first outer ring side wall is connected to one side of the second outer ring side wall, and the upper surface is connected to the other side of the second outer ring side wall and one side of the inner ring side wall; The lower surface is arranged horizontally, and the second outer ring side wall forms a first angle with the lower surface.

[0008] Furthermore, the upper surface and the lower surface of the first web portion are arranged horizontally.

[0009] Furthermore, the upper surface of the second web portion adopts a curved structure.

[0010] Furthermore, the thickness of the third web portion gradually increases with increasing distance from the web portion center line.

[0011] Furthermore, the upper surface of the supporting ring body includes a first surface and a second surface, one side of the first surface is connected to the second outer ring side wall, and the second surface is connected to the other side of the first surface and the upper surface of the third spoke portion, and the second surface and the upper surface of the third spoke portion form a third angle.

[0012] Furthermore, the inner edge radius of the inner ring body is less than or equal to 12.20 mm and greater than or equal to 8.40 mm; The outer edge radius of the supporting ring body is less than or equal to 26.60 mm and greater than or equal to 33.90 mm; The width of the second outer ring sidewall is less than or equal to 8.60 mm, and the axial length of the inner ring body is greater than or equal to 5.00 mm and less than or equal to 7.40 mm.

[0013] Furthermore, the radius of the connecting edge between the first surface and the side wall of the second outer ring is the difference between the outer edge radius of the supporting ring body and 6.60 mm; The radius of the connecting edge between the first surface and the second surface is the difference between the outer edge radius of the supporting ring body and 7.30 mm; The radius of the connecting edge between the lower surface and the first outer ring side wall is the difference between 0.73 times the outer edge radius of the supporting ring body and 0.27 times the inner edge radius of the inner ring body.

[0014] Furthermore, the inner ring body includes a first ring portion and a second ring portion that are connected to each other in an inner and outer manner, the upper surface of the first ring portion is arranged horizontally, the upper surface of the second ring portion connects the upper surface of the first ring portion and the upper surface of the first spoke portion, and the upper surface of the second ring portion forms a second angle with the upper surface of the first spoke portion; The radius of the connecting edge between the upper surface of the first ring portion and the upper surface of the second ring portion is the sum of the inner edge radius of the inner ring body and 2.40 mm.

[0015] Further, the radial thickness of the first spoke portion is 0.11 times the difference between the outer edge radius of the supporting ring body portion and the inner edge radius of the inner ring body portion; The radial thickness of the second spoke portion is 0.21 times the difference between the outer edge radius of the supporting ring body portion and the inner edge radius of the inner ring body portion; The radial thickness of the third spoke portion is 0.27 times the difference between the outer edge radius of the supporting ring body portion and the inner edge radius of the inner ring body portion.

[0016] Compared with the prior art, the embodiment of the present application has at least the following advantages: The spoke-thickness-variation aviation gear of the present application, on the basis of the conventional gear, has a groove on the upper surface of the spoke portion, thereby reducing the weight of the spoke portion and the whole gear, and the thicknesses of the first spoke portion, the second spoke portion and the third spoke portion are adjusted and limited based on the different functions of different positions of the spoke portion, so as to control the torsional stiffness, gear vibration characteristics and bending strength of the whole gear, to realize the overall weight reduction while meeting the bearing requirement, and to optimize the gear structure.

[0017] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by means of the structures pointed out in the description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0019] Figure 1 A schematic diagram of the spoke-thickness-variation aviation gear in the embodiment of the present application is shown; Figure 2 A bottom view schematic diagram of the spoke-thickness-variation aviation gear in the embodiment of the present application is shown; Figure 3 A cross-sectional view of A-A in the embodiment of the present application is shown; Figure 2 Figure 4 A equivalent stress calculation result schematic diagram of the spoke-thickness-variation aviation gear in the embodiment of the present application is shown.

[0020] In the figure, the shaft portion 1, the tooth portion 2, the spoke portion 3, the inner ring body portion 4, the first spoke portion 5, the second spoke portion 6, the third spoke portion 7, the supporting ring body portion 8. DETAILED DESCRIPTION​

[0021] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] The aviation gear based on the variable thickness design of the spoke plate can realize the high load-bearing innovative configuration design of the gear by significantly reducing the gear mass when the stress is far less than the yield limit, saving materials and reducing costs. The present invention provides an aviation gear with variable thickness of the spoke plate. Figure 1 A schematic diagram showing an aviation gear with a varying web thickness according to an embodiment of the present invention is shown. Figure 1 The aviation gear with a variable web thickness includes: a shaft portion 1, a tooth portion 2, and a web portion 3 in a circular ring structure, wherein the shaft portion 1 is coaxially connected to the web portion 3, and the tooth portion 2 is coaxially connected to the outer ring side wall of the web portion 3; It should be noted that the axial thickness of the spokes of conventional aviation gears mostly adopts one specification, that is, the axial thickness value is a fixed value. The present invention provides a groove on the upper surface of the spoke portion 3, thereby reducing the weight of the spoke portion 3, and based on the different structures on the upper surface of the spoke portion 3, the spoke portion 3 is divided into an inner ring body 4, a first spoke portion 5, a second spoke portion 6, a third spoke portion 7, and a supporting ring body 8, which are sequentially connected in the form of inner and outer rings. Figure 3 In the example shown, the inner ring portion 4, the first spoke portion 5, the second spoke portion 6, the third spoke portion 7, and the supporting ring portion 8 are divided by dotted lines; refer to Figure 2 The inner ring body 4 is a circular ring structure with the axis of the spoke plate 3 as the axis. The side wall of the inner ring body 4 is coaxially connected to the shaft 1 of the gear to transmit torque. The supporting ring body 8 is used to connect the tooth part 2 of the gear to directly support the root of the gear and withstand the bending stress generated by meshing. The thickness value is defined as the distance between the upper surface and the lower surface of the web portion 3. The thickness design of the inner ring body 4 is based on the thickness of the original web portion. The thickness of the first web portion 5 is less than the thickness of the inner ring body 4. The thickness of the connection between the first web portion 5 and the second web portion 6 is less than the thickness of the connection between the second web portion 6 and the third web portion 7. The thickness of the connection between the third web portion 7 and the second web portion 6 is greater than the thickness of the connection between the third web portion 7 and the supporting ring body 8. The outer ring side wall of the supporting ring body 8 is coaxially sleeved with the tooth portion 2. The thickness of the connection between the second spoke portion 6 and the first spoke portion 5 and the thickness of the connection between the second spoke portion 6 and the third spoke portion 7 are both smaller than the height of the radial middle position of the second spoke portion 6 .

[0024] The aviation gear with variable spoke thickness disclosed in the present invention, on the basis of traditional gears, has a groove on the upper surface of the spoke portion 3, thereby reducing the weight of the spoke portion 3 and the gear as a whole. Based on the different functions played by different positions of the spoke portion 3, the thicknesses of the first spoke portion 5, the second spoke portion 6 and the third spoke portion 7 are adjusted and limited to achieve regulation of the overall torsional stiffness, gear vibration characteristics and bending strength of the gear, thereby achieving overall weight reduction while meeting the load-bearing requirements and optimizing the gear structure.

[0025] In this embodiment, the web portion 3 includes an inner ring side wall, a lower surface, a first outer ring side wall, a second outer ring side wall and an upper surface; The lower surface is the side wall of the web portion 3 facing the shaft portion 1, the lower surface is connected to one side of the first outer ring side wall, the other side of the first outer ring side wall is connected to one side of the second outer ring side wall, and the upper surface is connected to the other side of the second outer ring side wall and one side of the inner ring side wall; The lower surface is arranged horizontally, and the second outer ring sidewall forms a first angle α with the lower surface. Exemplarily, the first angle α=128.90°.

[0026] In this embodiment, the upper surface and the lower surface of the first spoke portion 5 are arranged horizontally, and the thickness of the first spoke portion 5 is fixed. Through the parallel design of the upper surface and the lower surface of the first spoke portion 5, the gear as a whole is provided with bending and torsional rigidity to resist the stress of shaft deformation.

[0027] In this embodiment, on the basis that the thickness at the connection between the second spoke portion 6 and the first spoke portion 5 and the thickness at the connection between the second spoke portion 6 and the third spoke portion 7 are both less than the thickness at the radial middle position of the second spoke portion 6, it is further limited that the upper surface of the second spoke portion 6 adopts a curved surface structure, so that the cross-section of the upper surface of the second spoke portion 6 changes in a curved shape, thereby achieving the adjustment of the vibration characteristics of the gear to avoid resonance damage.

[0028] Exemplarily, the cross section of the upper surface of the second spoke portion 6 is formed by curve fitting of a quadratic function, and the highest point of the curve is located between the connection points of the second spoke portion 6 and the first and third spoke portions 5 and 7 .

[0029] That is, the cross-sectional curve expression of the upper surface of the second spoke portion 6 is: (1) Where x represents the coordinate direction, y represents the coordinate direction, and a, b, and c represent parameters.

[0030] In this embodiment, the thickness of the third spoke portion 7 gradually increases with the increase of the distance from the center line of the spoke portion 3, so that the cross-section of the upper surface of the third spoke portion 7 shows a linear trend of change, meeting the bending strength requirements at the tooth root to prevent the gear teeth from breaking.

[0031] It should be noted that the aviation gear based on the variable thickness design of the spoke plate proposed in this application is suitable for situations where the tangential component of the meshing force on the gear teeth is less than or equal to 522N, the axial component of the gear meshing force is less than or equal to 280N, and the gear speed is less than or equal to 350rpm.

[0032] The upper surface of the supporting ring body 8 includes a first surface and a second surface, one side of the first surface is connected to the second outer ring side wall, and the second surface is connected to the other side of the first surface and the upper surface of the third spoke plate portion 7, and the second surface and the upper surface of the third spoke plate portion 7 form a third angle; illustratively, γ is the angle between the second surface and the upper surface of the third spoke plate portion 7, and γ = 69.90°.

[0033] In this embodiment, the specification parameters of the inner ring body 4 and the supporting ring body 8 are used as independent variables. Accordingly, the inner edge radius R0 of the inner ring body 4 is set to be less than or equal to 12.20 mm and greater than or equal to 8.40 mm. The outer edge radius R1 of the supporting ring body 8 is less than or equal to 26.60 mm and greater than or equal to 33.90 mm, specifically referring to the distance between the connecting edge of the first outer ring side wall and the second outer ring side wall and the axis of the web portion 3; The width d1 of the second outer ring side wall is less than or equal to 8.60 mm, and the axial length d2 of the inner ring body 4 is greater than or equal to 5.00 mm and less than or equal to 7.40 mm.

[0034] Correspondingly, the radius R2 of the connecting edge between the first surface and the second outer ring side wall is the difference between the outer edge radius R1 of the supporting ring body 8 and 6.60 mm; The radius R4 of the connecting edge between the first surface and the second surface is the difference between the outer edge radius R1 of the supporting ring body 8 and 7.30 mm; The radius R3 of the connecting edge between the lower surface and the first outer ring side wall is the difference between 0.73 times the outer edge radius R1 of the supporting ring body 8 and 0.27 times the inner edge radius R0 of the inner ring body 4; In addition, the inner ring body 4 includes a first ring portion and a second ring portion that are connected to each other. The upper surface of the first ring portion is arranged horizontally, and the upper surface of the second ring portion connects the upper surface of the first ring portion and the upper surface of the first spoke portion 5. The upper surface of the second ring portion forms a second angle β with the upper surface of the first spoke portion 5. Exemplarily, the second angle β = 123.80°. Correspondingly, the radius R5 of the connecting edge between the upper surface of the first ring portion and the upper surface of the second ring portion is the sum of the inner edge radius R0 of the inner ring body 4 and 2.40 mm; In this embodiment, the upper surfaces of the inner ring body 4, the first spoke portion 5, the second spoke portion 6, the third spoke portion 7, and the supporting ring body 8 all adopt rounded transitions, and the rounded radius r1 between the upper surface of the second ring portion and the upper surface of the first spoke portion 5, the rounded radius r2 between the upper surface of the first spoke portion 5 and the upper surface of the second spoke portion 6, and the rounded radius r3 between the upper surface of the second spoke portion 6 and the upper surface of the third spoke portion 7 are all consistent, and the rounded radius r4 between the upper surface of the third spoke portion 7 and the second surface of the supporting ring body 8 is twice the rounded radius r3 between the upper surface of the second spoke portion 6 and the upper surface of the third spoke portion 7.

[0035] Correspondingly, the radial thickness L1 of the first web portion 5 is 0.11 times the difference between the outer radius R1 of the supporting ring portion 8 and the inner radius R0 of the inner ring portion 4; The radial thickness L2 of the second web portion 6 is 0.21 times the difference between the outer radius R1 of the supporting ring portion 8 and the inner radius R0 of the inner ring portion 4; The radial thickness L3 of the third web portion 7 is 0.27 times the difference between the outer radius R1 of the supporting ring portion 8 and the inner radius R0 of the inner ring portion 4 .

[0036] In this embodiment, the height difference H1 between the connecting edge of the first surface of the supporting ring body 8 and the second outer ring side wall and the lower surface is 11.40 mm; The height difference W between the connecting edge of the first surface and the second surface of the supporting ring body 8 and the lower surface is 11.10 mm.

[0037] In this embodiment, the density of the material of the aviation gear with varying web thickness is less than or equal to 7860 kg / m 3 The yield strength of the material of which the bevel gear web is made is greater than or equal to 940 MPa.

[0038] The following summary is made based on the inner edge radius R0 of the inner ring body 4 and the outer edge radius R1 of the supporting ring body 8: R0 represents the inner edge radius of the inner ring body 4, 8.40≤R0≤12.20, in mm; R1 represents the outer edge radius of the supporting ring body 8, 26.60≤R1≤33.90, in mm; R2 represents the radius of the connecting edge between the first surface and the side wall of the second outer ring, R2=R1-6.60, in mm; R3 represents the radius of the connection between the lower surface and the side wall of the first outer ring, R3 = R1-0.27(R1-R0), in mm; R4 represents the radius of the connecting edge between the first surface and the second surface, R4 = R1-7.30, in mm; R5 represents the radius of the connecting edge between the upper surface of the first ring portion and the upper surface of the second ring portion, R5=R0+2.40, in mm; H1 represents the height difference between the connecting edge of the first surface of the supporting ring body 8 and the second outer ring side wall and the lower surface, H1=11.40, in mm; W represents the height difference between the connecting edge of the first surface and the second surface of the supporting ring body 8 and the lower surface, W=11.10, in mm; L1 represents the radial thickness of the first web portion 5, L1 = 0.11 (R1 - R0), in mm; L2 represents the radial thickness of the second web portion 6, L2 = 0.21 (R1 - R0), in mm; L3 represents the radial thickness of the third web portion 7, L3 = 0.27 (R1 - R0), in mm; α represents the first included angle between the side wall of the second outer ring and the lower surface, α=128.90°; β represents a second included angle between the upper surface of the second ring portion and the upper surface of the first web portion 5 , β=123.80°; γ represents a third angle between the second surface and the upper surface of the third web portion 7, γ=69.90°; r1 represents the fillet radius between the upper surface of the second ring portion and the upper surface of the first web portion 5 , r1=0.50, in mm; r2 represents the fillet radius between the upper surface of the first web portion 5 and the upper surface of the second web portion 6, r2=0.50, in mm; r3 represents the fillet radius between the upper surface of the second web portion 6 and the upper surface of the third web portion 7, r3 = 0.50, in mm; r4 represents the fillet radius between the upper surface of the third web portion 7 and the second surface of the supporting ring portion 8, r4=1, and the unit is mm.

[0039] To further illustrate this application, refer to Figure 1 and Figure 3 , with a material density of 7.86g / cm 3 Taking 9310 steel as an example, the corresponding material yield strength is greater than or equal to 940 MPa, taking the input load as the maximum, and assuming that the inner edge radius R0 of the inner ring body 4 is 9.50 mm, the outer edge radius R1 of the support body 4 is 30.82 mm, the width d1 of the second outer ring side wall is 8.07 mm, and the axial length d2 of the inner ring body 4 is 5.60 mm, the parameters of each structure are summarized and described: R0 represents the inner edge radius of the inner ring body 4, R0 = 9.50 mm; R1 represents the outer edge radius of the supporting ring body 8, R1 = 30.82 mm; R2 represents the radius of the connecting edge between the first surface and the side wall of the second outer ring, R2 = 24.22 mm; R3 represents the radius of the connection between the lower surface and the side wall of the first outer ring, R3 = 24.97 mm; R4 represents the radius of the connecting edge between the first surface and the second surface, R4 = 23.49 mm; R5 represents the radius of the connecting edge between the upper surface of the first ring portion and the upper surface of the second ring portion, R5 = 11.86 mm; H1 represents the height difference between the connecting edge of the first surface of the supporting ring body 8 and the second outer ring side wall and the lower surface, H1 = 11.40 mm; W represents the height difference between the connecting edge of the first surface and the second surface of the supporting ring body 8 and the lower surface, W=11.10mm; L1 represents the radial thickness of the first web portion 5, L1 = 2.24 mm; L2 represents the radial thickness of the second web portion 6, L2 = 4.10 mm; L3 represents the radial thickness of the third web portion 7, L3 = 5.24 mm; α represents the angle between the bottom surface of the web and the bottom surface of the tooth portion (2), α = 128.90°; β represents the angle between the first straight line segment (A1) and the second straight line segment (A2), β = 123.80°; γ represents the angle between the fourth straight line segment (A4) and the fifth straight line segment (A5), γ = 69.90°; r1 represents the fillet radius between the upper surface of the second ring portion and the upper surface of the first web portion 5 , r1=0.50 mm; r2 represents the fillet radius between the upper surface of the first web portion 5 and the upper surface of the second web portion 6, r2 = 0.50 mm; r3 represents the fillet radius between the upper surface of the second web portion 6 and the upper surface of the third web portion 7, r3 = 0.50 mm; r4 represents the fillet radius between the upper surface of the third web portion 7 and the second surface of the supporting ring portion 8, r4=1mm; d1 represents the width of the second outer ring side wall, d1=8.07mm; d2 represents the axial length of the inner ring body 4, d2=5.60mm.

[0040] The thickness variation curve of the second web portion 6 is set to be fitted as follows: (2) In the formula, x represents the coordinate direction, y represents the coordinate direction, a, b, and c represent parameters, and the formula takes the upper surface point where the thickness of the second web portion 6 is the largest as the origin.

[0041] Finite element simulation analysis is performed on the aviation gear with varying spoke thickness designed based on the above parameters. The grid unit size is adjusted to 2 mm and the number of grid units is adjusted to 26775. The calculation results of the equivalent stress (von Mises stress) are shown in the cloud diagram. Figure 4 As shown, its volume is 2.6146×10 4 mm 3 , with a mass of 0.2055kg.

[0042] After analysis, the maximum von Mises stress of the gear under different working conditions is 348.36MPa, which is far less than the yield strength, and the mass is reduced by 24.9%. This achieves a significant reduction in the overall weight of the gear while meeting the yield limit requirements, improves the overall performance of the equipment, saves materials and reduces costs.

[0043] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0044] It should be understood that all terms used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and should not be understood as a limitation on the present invention.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aviation gear with a variable web thickness, comprising: A shaft portion (1), a tooth portion (2), and a spoke portion (3), wherein the shaft portion (1) is coaxially connected to the spoke portion (3), and the tooth portion (2) is coaxially connected to the outer ring side wall of the spoke portion (3), and is characterized in that the spoke portion (3) comprises an inner ring body portion (4), a first spoke portion (5), a second spoke portion (6), a third spoke portion (7), and a supporting ring body portion (8) in the form of an inner and outer ring that are sequentially sleeved. The thickness of the first spoke portion (5) is smaller than the thickness of the inner ring portion (4); the thickness of the connection between the first spoke portion (5) and the second spoke portion (6) is smaller than the thickness of the connection between the second spoke portion (6) and the third spoke portion (7); and the thickness of the connection between the third spoke portion (7) and the second spoke portion (6) is greater than the thickness of the connection between the third spoke portion (7) and the supporting ring portion (8); and the outer ring side wall of the supporting ring portion (8) is coaxially sleeved with the tooth portion (2); The thickness of the connection between the second spoke portion (6) and the first spoke portion (5), and the thickness of the connection between the second spoke portion (6) and the third spoke portion (7) are both smaller than the thickness of the radial middle position of the second spoke portion (6).

2. The aviation gear with variable web thickness according to claim 1, characterized in that: The web portion (3) comprises an inner ring side wall, a lower surface, a first outer ring side wall, a second outer ring side wall and an upper surface; The lower surface is a side wall of the spoke portion (3) facing the shaft portion (1), the lower surface is connected to one side of the first outer ring side wall, the other side of the first outer ring side wall is connected to one side of the second outer ring side wall, and the upper surface is connected to the other side of the second outer ring side wall and one side of the inner ring side wall; The lower surface is arranged horizontally, and the second outer ring side wall forms a first angle with the lower surface.

3. The aviation gear with variable web thickness according to claim 2, characterized in that: The upper surface and the lower surface of the first web portion (5) are arranged horizontally.

4. The aviation gear with variable web thickness according to claim 3, characterized in that: The upper surface of the second web portion (6) adopts a curved surface structure.

5. The aviation gear with variable web thickness according to claim 4, characterized in that: The thickness of the third web portion (7) gradually increases as the distance from the center line of the web portion (3) increases.

6. The aviation gear with variable web thickness according to claim 2, characterized in that: The upper surface of the supporting ring body (8) comprises a first surface and a second surface, wherein one side of the first surface is connected to the second outer ring side wall, and the second surface is connected to the other side of the first surface and the upper surface of the third spoke portion (7), and the second surface and the upper surface of the third spoke portion (7) form a third angle.

7. The aviation gear with variable web thickness according to claim 6, characterized in that: The inner edge radius of the inner ring body (4) is less than or equal to 12.20 mm and greater than or equal to 8.40 mm; The outer edge radius of the supporting ring body (8) is less than or equal to 26.60 mm and greater than or equal to 33.90 mm; The width of the second outer ring side wall is less than or equal to 8.60 mm, and the axial length of the inner ring body (4) is greater than or equal to 5.00 mm and less than or equal to 7.40 mm.

8. The aviation gear with variable web thickness according to claim 7, characterized in that: The radius of the connecting edge between the first surface and the second outer ring side wall is the difference between the outer edge radius of the supporting ring body (8) and 6.60 mm; The radius of the connecting edge between the first surface and the second surface is the difference between the outer edge radius of the supporting ring body (8) and 7.30 mm; The radius of the connecting edge between the lower surface and the first outer ring side wall is the difference between 0.73 times the outer edge radius of the supporting ring body (8) and 0.27 times the inner edge radius of the inner ring body (4).

9. The aviation gear with variable web thickness according to claim 8, characterized in that: The inner ring body (4) comprises a first ring portion and a second ring portion which are connected to each other in an inner and outer manner, the upper surface of the first ring portion is arranged horizontally, the upper surface of the second ring portion is connected to the upper surface of the first ring portion and the upper surface of the first spoke portion (5), and the upper surface of the second ring portion forms a second angle with the upper surface of the first spoke portion (5); The radius of the connecting edge between the upper surface of the first ring portion and the upper surface of the second ring portion is the sum of the inner edge radius of the inner ring body (4) and 2.40 mm.

10. The aviation gear with variable web thickness according to claim 9, characterized in that: The radial thickness of the first web portion (5) is 0.11 times the difference between the outer edge radius of the supporting ring portion (8) and the inner edge radius of the inner ring portion (4); The radial thickness of the second web portion (6) is 0.21 times the difference between the outer radius of the supporting ring portion (8) and the inner radius of the inner ring portion (4); The radial thickness of the third web portion (7) is 0.27 times the difference between the outer edge radius of the supporting ring portion (8) and the inner edge radius of the inner ring portion (4).

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