The web of a helical gear

Abstract

The present application discloses a spoke plate of a helical gear, which includes a first spoke plate, a second spoke plate and a plurality of connecting columns; the first spoke plate and the second spoke plate are arranged along the rotation axis direction of the helical gear; the first spoke plate is closer to the tooth top of the tooth portion and is provided with two first surfaces that are both perpendicular to the rotation axis and away from each other; the second spoke plate includes an inner ring body and an outer ring body that are connected to each other as a whole; the inner ring body is in a circular ring shape and is provided with two second surfaces that are both perpendicular to the rotation axis and away from each other; the inner edge of the outer ring body is connected to the outer edge of the inner ring body, and the outer ring body is provided with two third surfaces that are away from each other, and the two line segments formed by the two third surfaces on the cross section passing through the rotation axis are parallel to each other and are both inclined relative to the rotation axis, and the inclination direction is radially outward close to the first surface; the connecting column extends along the rotation axis direction, and is used to connect the first surface and the second surface that are opposite to each other. The above-mentioned spoke plate has an innovative configuration and achieves lightweight under the premise of ensuring that stress requirements are met.

Description

Technical Field

[0001] This application relates to the field of helical gears, and particularly to a web plate of a helical gear. Background Art

[0002] The transmission system is one of the three key moving components of a helicopter. It is an essential power transmission component for the power output of a turboshaft engine, and its performance largely determines the overall performance of the helicopter. As the core component of the transmission system, helical gears / helical gear trains have always attracted the attention of researchers. In terms of the design optimization of helical gears, preliminary research has been carried out by domestic and foreign scholars. These studies mainly focus on the size optimization of conventional solid-configured helical gears, and most of the research is carried out under simple working conditions and single-discipline conditions, and the weight reduction potential of advanced optimization design techniques has not been fully explored. In particular, with the substantial increase in the demand for the transmission power of the reducer in the transmission system, the loads borne by helical gears are becoming larger and more complex, their own structural dimensions are larger and heavier, and the dynamic problems are more prominent. The need for lightweight design under complex working conditions is more urgent. Summary of the Invention

[0003] The purpose of this application is to overcome the above-mentioned defects or problems in the background art, and provide a web plate of a helical gear. The web plate of the helical gear has an innovative configuration and can achieve lightweight under the premise of meeting the stress requirements of the helical gear.

[0004] To achieve the above purpose, the following technical solutions are adopted:

[0005] A web plate of a helical gear is used to connect the shaft part and the tooth part of the helical gear. The characteristics are that the web plate includes a first web plate, a second web plate and a plurality of connecting columns; both the first web plate and the second web plate are connected to the shaft part and the tooth part and are arranged along the rotation axis direction of the helical gear; the first web plate is closer to the tooth tip of the tooth part and is circular, and it is provided with two first surfaces that are both perpendicular to the rotation axis and face away from each other; the second web plate includes an inner ring body and an outer ring body that are integrally connected; the inner ring body is circular, its inner edge is connected to the shaft part, its outer edge is connected to the inner edge of the outer ring body, and it is provided with two second surfaces that are both perpendicular to the rotation axis and face away from each other; the outer edge of the outer ring body is connected to the tooth part, the outer ring body is provided with two third surfaces that face away from each other, and two line segments formed by the two third surfaces in the cross-section passing through the rotation axis are parallel to each other and are both inclined relative to the rotation axis, and the inclination direction is along the radial direction and outward close to the first surface; the connecting columns extend along the rotation axis direction and are used to connect the first surface and the second surface that face each other, and each connecting column is evenly distributed around the rotation axis.

[0006] Further, the projection of the connecting column on the projection plane perpendicular to the rotation axis sequentially includes a first arc segment, a first straight segment, a second arc segment, and a second straight segment. The first straight segment and the second straight segment are both connected to and tangent to the first arc segment and the second arc segment. The radius of the first arc segment is greater than the radius of the second arc segment. The first arc segment and the second arc segment are bent in opposite directions. The centers of the first arc segment and the second arc segment are distributed along the diameter direction passing through the rotation axis, and the center of the first arc segment is farther from the rotation axis than the center of the second arc segment.

[0007] Further, a plurality of first holes are provided on the first web plate. The number of the first holes is equal to and corresponds one by one to the number of the connecting columns. The first holes penetrate through the two first surfaces. The projection of the first holes on the projection plane perpendicular to the rotation axis sequentially includes a third arc segment, a third straight segment, a fourth arc segment, and a fourth straight segment. The third straight segment and the fourth straight segment are both connected to and tangent to the third arc segment and the fourth arc segment. The radius of the third arc segment is greater than the radius of the fourth arc segment. The third arc segment and the fourth arc segment are bent in opposite directions. The third arc segment is closer to the connecting column than the fourth arc segment. The direction from the center of the third arc segment to the center of the fourth arc segment is in the same direction as the rotation direction of the helical gear.

[0008] Further, a plurality of second holes are provided on the inner ring body. The number of the second holes is equal to and corresponds one by one to the number of the connecting columns. The second holes penetrate through the two second surfaces. The projection of the second holes on the projection plane perpendicular to the rotation axis sequentially includes a fifth arc segment, a fifth straight segment, a sixth arc segment, and a sixth straight segment. The fifth straight segment and the sixth straight segment are both connected to and tangent to the fifth arc segment and the sixth arc segment. The radius of the fifth arc segment is greater than the radius of the sixth arc segment. The fifth arc segment and the sixth arc segment are bent in opposite directions. The fifth arc segment is closer to the connecting column than the sixth arc segment. The direction from the center of the fifth arc segment to the center of the sixth arc segment is opposite to the rotation direction of the helical gear.

[0009] Further, on the same projection plane, the projection of the connecting column is located between the projection of the first holes and the projection of the second holes.

[0010] Further, the distance between the two first surfaces is greater than the distance between the two second surfaces and also greater than the distance between the two third surfaces.

[0011] Further, the radius of the third arc segment is greater than the radius of the fifth arc segment, and the radius of the fifth arc segment is greater than the radius of the first arc segment.

[0012] Further, on the projection plane, the projected area of the connecting column is smaller than the projected area of the second hole, and the projected area of the second hole is smaller than the projected area of the first hole.

[0013] Further, the number of the connecting columns is six.

[0014] Further, when the tangential component force of the tooth engagement force on the helical gear is less than or equal to 81000 N, the axial component force of the tooth engagement force is less than or equal to 23000 N, the radial component force of the tooth engagement force is less than or equal to 53000 N, and the rotational speed is less than or equal to 323 rpm, if the total mass of the tooth part is less than or equal to 20 kg, the yield strength of the material used for the web plate is greater than or equal to 700 Mpa and the material density is less than or equal to 7.86 g / cm 3 , then when 93 ≤ R0 ≤ 113 and 186.4 ≤ R1 ≤ 201.32, the following parameters of the web plate are: R2 = R1 - 28.665; R3 = R1 - 27.92; R4 = R1 - 44.34; R5 = R1 - 51.27; w0 = 47.76; w3 = 5; ∝ = 160°; r1 = 12.5; r2 = 7.5; r3 = 20; r4 = 10; r5 = 17.5; r ( = 7.5; L o1o2 = 15.29; L O3O4 = 35; L O5O6 = 39.45; ∠O1OO3 = 12°; ∠OO3O4 = 100°; ∠O1OO5 = 20°; ∠OO5O (= 99°; where, R0 is the radius of the inner edge of the spoke plate, in mm; R1 is the radius of the outer edge of the spoke plate, in mm; R2 is the radius of the outer edge of the inner ring body, in mm; R3 is the distance between the center of the first arc segment and the rotation axis, in mm; R4 is the distance between the center of the third arc segment and the rotation axis, in mm; R5 is the distance between the center of the fifth arc segment and the rotation axis, in mm; w0 is the distance between the first surface of the first spoke plate away from the inner ring body and the second surface of the inner ring body away from the first spoke plate, in mm; w1 is the distance between two said first surfaces, in mm; w2 is the distance between two said second surfaces, in mm; w3 is the distance between two said third surfaces, in mm; ∝ is the angle between the intersection line of the third surface in the cross-section passing through the rotation axis and the intersection line of the second surface in the same cross-section; r1 is the radius of the first arc segment, in mm; r2 is the radius of the second arc segment, in mm; r3 is the radius of the third arc segment, in mm; r4 is the radius of the fourth arc segment, in mm; r5 is the radius of the fifth arc segment, in mm; r ( is the radius of the sixth arc segment, in mm; L o1o2 is the distance between the center of the first arc segment and the center of the second arc segment, in mm; L O3O4 is the distance between the center of the third arc segment and the center of the fourth arc segment, in mm; L o5o6 is the distance between the center of the fifth arc segment and the center of the sixth arc segment, in mm; ∠O1OO3 is the angle between the perpendicular line from the center of the first arc segment to the rotation axis and the perpendicular line from the center of the third arc segment to the rotation axis; ∠OO3O4 is the angle between the perpendicular line from the center of the third arc segment to the rotation axis and the connecting line from the center of the third arc segment to the center of the fourth arc segment; ∠O1OO5 is the angle between the perpendicular line from the center of the first arc segment to the rotation axis and the perpendicular line from the center of the fifth arc segment to the rotation axis; ∠OO5O ( is the angle between the perpendicular line from the center of the fifth arc segment to the rotation axis and the connecting line from the center of the fifth arc segment to the center of the sixth arc segment.

[0015] Compared with the prior art, the above solution has the following beneficial effects:

[0016] The spoke plate of the helical gear involved in the present application is composed of a first spoke plate, a second spoke plate and several connecting columns, which is lighter in weight and meets the requirements of stress and deformation. Compared with the spoke plate of the helical gear in the prior art, lightweight is achieved. Brief Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments, the drawings required for use are briefly introduced below:

[0018] Figure 1 Front view of the helical gear in the embodiment;

[0019] Figure 2 For Figure 1 Cross-sectional view taken along the M-M direction;

[0020] Figure 3 For Figure 2 Partial enlarged view of part X;

[0021] Figure 4 Bottom view of the helical gear in the embodiment;

[0022] Figure 5 For Figure 4 Cross-sectional view taken along the N-N direction;

[0023] Figure 6 For Figure 4 Partial enlarged view of part Y;

[0024] Figure 7 Rear view of the helical gear in the embodiment;

[0025] Figure 8 For Figure 7 Partial enlarged view of part Z;

[0026] Main reference numeral description:

[0027] Helical gear 1; tooth part 4; web 3; first web 31; first hole 311; second web 32; inner ring body 321; outer ring body 322; second hole 323; connecting column 33; shaft part 2. Detailed Description of the Invention

[0028] In the claims and the specification, unless otherwise defined, the terms "first", "second", or "third", etc., are used to distinguish different objects, rather than to describe a specific order.

[0029] In the claims and the specification, unless otherwise defined, the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the convenience of simplified description, rather than implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0030] In the claims and the specification, unless otherwise defined, the term "fixed connection" or "fixedly connected" shall be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as a whole, and being fixedly connected through other devices or elements.

[0031] In the claims and the specification, unless otherwise defined, the terms "comprising", "having" and their variants mean "including but not limited to".

[0032] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.

[0033] See Figure 1 and Figure 2 , Figure 1 show the structure of the helical gear 1 in the embodiment. As Figure 1 and Figure 2 shown, the helical gear 1 includes a shaft portion 2, a tooth portion 4 and a web 3 that radially connects the shaft portion 2 and the tooth portion 4 and are integrated as a whole with each other.

[0034] As Figure 2 shown, the web 3 includes a first web 31, a second web 32 and a plurality of connecting columns 33.

[0035] Both the first web 31 and the second web 32 are connected to the shaft portion 2 and the tooth portion 4 and are arranged along the extension direction of the rotation axis O of the helical gear 1.

[0036] As Figure 2 and Figure 3 shown, the first web 31 is closer to the tooth tip of the tooth portion 4 and is circular, and it is provided with two first surfaces that are both perpendicular to the rotation axis O and face away from each other.

[0037] The second web 32 includes an inner ring body 321 and an outer ring body 322 that are integrated as a whole with each other; the inner ring body 321 is circular, its inner edge is connected to the shaft portion 2, its outer edge is connected to the inner edge of the outer ring body 322, and it is provided with two second surfaces that are both perpendicular to the rotation axis O and face away from each other. The outer edge of the outer ring body 322 is connected to the tooth portion 4, and the outer ring body 322 is provided with two third surfaces that face away from each other. The two line segments formed by the two third surfaces in the cross-section passing through the rotation axis O are parallel to each other and are both inclined relative to the rotation axis O, and the inclination direction is radially outward and close to the first surface.

[0038] The connecting columns 33 extend along the direction of the rotation axis O and are used to connect the first surface and the second surface that face each other. As Figure 4 shown, the number of the connecting columns 33 is 6, and each connecting column 33 is evenly distributed around the rotation axis O.

[0039] As Figure 4 , Figure 5And Figure 6 As shown in Figure 6 , the projection of the connecting column 33 on the projection plane perpendicular to the rotation axis O successively includes a first arc segment DA, a first straight segment AB, a second arc segment BC, and a second straight segment CD. The first straight segment AB and the second straight segment CD are both connected to and tangent to the first arc segment DA and the second arc segment BC. The radius r1 of the first arc segment DA is greater than the radius r2 of the second arc segment BC. The first arc segment DA and the second arc segment BC are bent in opposite directions. The centers O1 of the first arc segment DA and O2 of the second arc segment BC are distributed along the diameter direction passing through the rotation axis O, and the center O1 of the first arc segment DA is farther from the rotation axis O than the center O2 of the second arc segment BC.

[0040] As Figure 5 And Figure 6 As shown in Figure 5 and Figure 6 , a plurality of first holes 311 are provided on the first web 31. The number of the first holes 311 is equal to the number of the connecting columns 33, both being 6 and corresponding one by one. The first holes 311 penetrate through the two first surfaces. The projection of the first holes 311 on the projection plane perpendicular to the rotation axis O successively includes a third arc segment HE, a third straight segment EF, a fourth arc segment FG, and a fourth straight segment GH. The third straight segment EF and the fourth straight segment GH are both connected to and tangent to the third arc segment HE and the fourth arc segment FG. The radius r3 of the third arc segment HE is greater than the radius r4 of the fourth arc segment FG. The third arc segment HE and the fourth arc segment FG are bent in opposite directions. The third arc segment HE is closer to the corresponding connecting column 33 than the fourth arc segment FG. The direction from the center O3 of the third arc segment HE to the center O4 of the fourth arc segment FG is in the same direction as the rotation direction of the helical gear 1.

[0041] As Figure 7 And Figure 8 As shown in Figure 7 and Figure 8 , a plurality of second holes 323 are provided on the inner ring body 321. The number of the second holes 323 is equal to the number of the connecting columns 33, both being 6 and corresponding one by one. The second holes 323 penetrate through the two second surfaces. The projection of the second holes 323 on the projection plane perpendicular to the rotation axis O successively includes a fifth arc segment KI, a fifth straight segment IJ, a sixth arc segment JL, and a sixth straight segment LK. The fifth straight segment IJ and the sixth straight segment LK are both connected to and tangent to the fifth arc segment KI and the sixth arc segment JL. The radius r5 of the fifth arc segment KI is greater than the radius r ( , the fifth arc segment KI and the sixth arc segment JL are bent in opposite directions. The fifth arc segment KI is closer to the corresponding connecting column 33 than the sixth arc segment JL. The direction from the center O5 of the fifth arc segment KI to the center O ( of the sixth arc segment JL is opposite to the rotation direction of the helical gear 1.

[0042] As a specific design guide, as Figure 5 And Figure 7As shown, on the same projection plane perpendicular to the rotation axis O, the projection of the connecting column 33 is located between the projection of the first hole 311 and the projection of the second hole 323. The distance between the two first surfaces is greater than the distance between the two second surfaces, and also greater than the distance between the two third surfaces. The radius r3 of the third arc segment HE is greater than the radius r5 of the fifth arc segment KI, and the radius r5 of the fifth arc segment KI is greater than the radius r1 of the first arc segment DA.

[0043] In this embodiment, the helical gear 1 works when the tangential component of the meshing force on the gear teeth is less than or equal to 81000N, the axial component of the meshing force on the gear teeth is less than or equal to 23000N, the radial component of the meshing force on the gear teeth is less than or equal to 53000N, and the rotation speed is less than or equal to 323rpm, and the total mass of the tooth portion 4 can be less than or equal to 20kg. The material used for the web 3 has a yield strength of 700Mpa and a material density of 7.86g / cm 3 .

[0044] As a more specific design guide, such as Figure 6 and Figure 8 As shown, when 93≤R0≤113 and 186.4≤R1≤201.32, the following parameters of the spoke 3 are:

[0045] R2 = R1 - 28.665;

[0046] R3 = R1 - 27.92;

[0047] R4 = R1 - 44.34;

[0048] R5 = R1 - 51.27;

[0049] w0=47.76;

[0050]

[0051] w3=5;

[0052] ∝=160°;

[0053] r1=12.5;

[0054] r2=7.5;

[0055] r3=20;

[0056] r4=10;

[0057] r5=17.5;

[0058] r ( =7.5;

[0059] L 01o2 =15.29;

[0060] L O3O4 = 35;

[0061] L o5O6 = 39.45;

[0062] ∠O1OO3 = 12°;

[0063] ∠OO3O4 = 100°;

[0064] ∠O1OO5 = 20°;

[0065] ∠OO5O ( = 99°;

[0066] wherein,

[0067] R0 is the radius of the inner edge of the web 3, in mm;

[0068] R1 is the radius of the outer edge of the web 3, in mm;

[0069] R2 is the radius of the outer edge of the inner ring body 321, in mm;

[0070] R3 is the distance between the center O1 of the first arc segment DA and the rotation axis O, in mm;

[0071] R4 is the distance between the center O3 of the third arc segment HE and the rotation axis O, in mm;

[0072] R5 is the distance between the center O5 of the fifth arc segment KI and the rotation axis O, in mm;

[0073] w0 is the distance between the first surface of the first web 31 away from the inner ring body 321 and the second surface of the inner ring body 321 away from the first web 31, in mm;

[0074] w1 is the distance between the two first surfaces, in mm;

[0075] w2 is the distance between the two second surfaces, in mm;

[0076] w3 is the distance between the two third surfaces, in mm;

[0077] ∝ is the angle between the intersection line of the third surface in the cross-section passing through the rotation axis O and the intersection line of the second surface in the same cross-section;

[0078] r1 is in mm;

[0079] r2 is in mm;

[0080] r3 is in mm;

[0081] The unit of r4 is mm;

[0082] The unit of r5 is mm;

[0083] r ( The unit is mm;

[0084] L O1O2 is the distance between the center O1 of the first circular arc segment DA and the center O2 of the second circular arc segment BC, and the unit is mm;

[0085] L O3O4 is the distance between the center O3 of the third circular arc segment HE and the center O4 of the fourth circular arc segment FG, and the unit is mm;

[0086] L o5o6 is the distance between the center O5 of the fifth circular arc segment KI and the center O ( therebetween, and the unit is mm;

[0087] ∠O1OO3 is the included angle between the perpendicular line from the center O1 of the first circular arc segment DA to the rotation axis O and the perpendicular line from the center O3 of the third circular arc segment HE to the rotation axis O;

[0088] ∠OO3O4 is the included angle between the perpendicular line from the center O3 of the third circular arc segment HE to the rotation axis O and the connecting line from the center O3 of the third circular arc segment HE to the center O4 of the fourth circular arc segment FG;

[0089] ∠O1OO5 is the included angle between the perpendicular line from the center O1 of the first circular arc segment DA to the rotation axis O and the perpendicular line from the center O5 of the fifth circular arc segment KI to the rotation axis O;

[0090] ∠OO5O ( is the included angle between the perpendicular line from the center O5 of the fifth circular arc segment KI to the rotation axis O and the connecting line from the center O5 of the fifth circular arc segment KI to the center O ( thereof.

[0091] In this embodiment, specifically, the value of R0 is 93 mm, the value of R1 is 201.32 mm, the value of R2 is 172.655 mm, the value of R3 is 173.4 mm, the value of R4 is 156.98 mm, the value of R5 is 150.05 mm, the value of w1 is 10 mm, and the value of w2 is 5 mm. The volume of the web 3 is 1.484×10 6 mm 3 , and the mass is 11.664 kg.

[0092] If the web 3 for the same environment is solid, its volume is 5.151*10 6 mm 3, with a mass of 40.484 kg. Therefore, the web 3 in this embodiment has a smaller volume and lighter mass compared to a solid web, and the mass can be reduced by 71.189%, achieving a good lightweight effect.

[0093] Perform a static analysis on the web 3 in the embodiment. The mesh division size is 2 mm, and the number of network elements is 1,487,575. The equivalent stress (von-Mises stress) of the web 3 is between 432.60 MPa and 488.32 MPa. The stress is much less than the material yield strength of 700 MPa and less than 500 MPa. Therefore, reliable operation can be ensured.

[0094] The above description of the specification and embodiments is used to explain the protection scope of the present application, but does not constitute a limitation on the protection scope of the present application.

Claims

1. A web of a helical gear, which is used to connect the shaft part and the tooth part of the helical gear, and is characterized in that, The spoke plate includes a first spoke plate, a second spoke plate and a plurality of connecting columns; The first spoke plate and the second spoke plate are both connected to the shaft portion and the tooth portion and are arranged along the rotation axis direction of the helical gear; The first spoke plate is closer to the tooth top of the tooth portion and is in a circular ring shape, and is provided with two first surfaces which are both perpendicular to the rotation axis and away from each other; The second spoke plate comprises an inner ring body and an outer ring body connected to each other as a whole; the inner ring body is in a circular shape, the inner edge of which is connected to the shaft portion, and the outer edge of which is connected to the inner edge of the outer ring body, and is provided with two second surfaces which are both perpendicular to the rotation axis and away from each other; the outer edge of the outer ring body is connected to the tooth portion, and the outer ring body is provided with two third surfaces which are away from each other, and two line segments formed by the two third surfaces on the cross section passing through the rotation axis are parallel to each other and are both inclined relative to the rotation axis, and the inclination direction is radially outward close to the first surface; The connecting posts extend along the direction of the rotation axis and are used to connect the first surface and the second surface opposite to each other; the connecting posts are evenly distributed around the rotation axis; The projection of the connecting column on the projection plane perpendicular to the rotation axis includes a first arc segment, a first straight line segment, a second arc segment and a second straight line segment in sequence, the first straight line segment and the second straight line segment are both connected to and tangent to the first arc segment and the second arc segment; the radius of the first arc segment is greater than the radius of the second arc segment, the first arc segment and the second arc segment are curved in opposite directions, the center of the first arc segment and the center of the second arc segment are distributed along the diameter direction of the rotation axis, and the center of the first arc segment is farther away from the rotation axis than the center of the second arc segment; A plurality of first holes are provided on the first spoke plate, the number of the first holes is equal to and corresponds to the number of the connecting posts, the first holes penetrate the two first surfaces, and the projections thereof on the projection plane perpendicular to the rotation axis sequentially include a third arc segment, a third straight line segment, a fourth arc segment and a fourth straight line segment, the third straight line segment and the fourth straight line segment are both connected to and tangent to the third arc segment and the fourth arc segment; the radius of the third arc segment is greater than the radius of the fourth arc segment, and the third arc segment and the fourth arc segment are curved in opposite directions; the third arc segment is closer to the connecting post than the fourth arc segment, and the direction in which the center of the third arc segment points to the center of the fourth arc segment is in the direction of rotation of the bevel gear; A plurality of second holes are provided on the inner ring body. The number of the second holes is equal to and corresponds one by one to the number of the connecting columns. The second holes penetrate through the two second surfaces, and their projections on the projection plane perpendicular to the rotation axis sequentially include a fifth arc segment, a fifth straight segment, a sixth arc segment, and a sixth straight segment. The fifth straight segment and the sixth straight segment are both connected to and tangent to the fifth arc segment and the sixth arc segment; the radius of the fifth arc segment is greater than the radius of the sixth arc segment, and the fifth arc segment and the sixth arc segment are bent in opposite directions; the fifth arc segment is closer to the connecting column than the sixth arc segment, and the direction from the center of the fifth arc segment to the center of the sixth arc segment is opposite to the rotation direction of the helical gear.

2. The web of a helical gear according to claim 1, wherein, On the same projection plane, the projection of the connecting column is located between the projection of the first hole and the projection of the second hole.

3. The web of a helical gear according to claim 2, characterized in that, The distance between the two first surfaces is greater than the distance between the two second surfaces and also greater than the distance between the two third surfaces.

4. The web of a helical gear according to claim 3, characterized in that, The radius of the third arc segment is greater than the radius of the fifth arc segment, and the radius of the fifth arc segment is greater than the radius of the first arc segment.

5. The web of a helical gear as claimed in claim 4, characterized in that, On the projection plane, the projected area of the connecting column is smaller than the projected area of the second hole, and the projected area of the second hole is smaller than the projected area of the first hole.

6. The web of a helical gear according to claim 5, characterized in that, The number of the connecting columns is six.

7. The web of a helical gear according to claim 6, characterized in that, When the tangential component of the meshing force on the tooth of the helical gear is less than or equal to 81000 N, the axial component of the meshing force on the tooth is less than or equal to 23000 N, the radial component of the meshing force on the tooth is less than or equal to 53000 N, and the rotational speed is less than or equal to 323 rpm, if the total mass of the tooth part is less than or equal to 20 kg, the yield strength of the material used for the web is greater than or equal to 700 Mpa and the material density is less than or equal to 7.86 g / cm 3 , then when and , The following parameters of the web plate are: ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； Among them, is the radius of the inner edge of the web plate, with the unit of mm; is the radius of the outer edge of the web, in mm; is the radius of the outer edge of the inner ring body, with the unit of mm; is the distance between the center of the first circular arc segment and the rotation axis, with the unit of mm; is the distance between the center of the third arc segment and the rotation axis, with the unit of mm; is the distance between the center of the fifth arc segment and the rotation axis, with the unit of mm; The distance between the first surface of the first web away from the inner ring body and the second surface of the inner ring body away from the first web, with the unit of mm; is the distance between the two first surfaces, in mm; is the distance between the two second surfaces, in mm; is the distance between the two third surfaces, in mm; is the included angle between the intersection line of the third surface in the section passing through the rotation axis and the intersection line of the second surface in the same section; is the radius of the first circular arc segment, in mm; is the radius of the second arc segment, in mm; is the radius of the third arc segment, in mm; is the radius of the fourth arc segment, in mm; is the radius of the fifth arc segment, in mm; is the radius of the sixth arc segment, in mm; is the distance between the center of the first circular arc segment and the center of the second circular arc segment, with the unit of mm; It is the distance between the center of the third arc segment and the center of the fourth arc segment, with the unit of mm; is the distance between the center of the fifth circular arc segment and the center of the sixth circular arc segment, with the unit of mm; is the included angle between the perpendicular line from the center of the first circular arc segment to the rotation axis and the perpendicular line from the center of the third circular arc segment to the rotation axis; is the included angle between the perpendicular line from the center of the third arc segment to the rotation axis and the connecting line from the center of the third arc segment to the center of the fourth arc segment; is the angle between the perpendicular line from the center of the first arc segment to the rotation axis and the perpendicular line from the center of the fifth arc segment to the rotation axis; It is the included angle between the perpendicular line from the center of the fifth arc segment to the rotation axis and the connecting line from the center of the fifth arc segment to the center of the sixth arc segment.

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