Hub bearing end face spline

Abstract

The invention relates to a hub bearing end face spline. Belongs to the technical field of machining. The end face gear mainly solves the problems that the service life is shortened and the transmission reliability becomes poor due to the fact that most teeth are possibly not in contact when the end face teeth are meshed with one another due to errors in the end face tooth machining process at present. The hub bearing is mainly characterized by comprising a hub bearing end face, the end face of the hub bearing is provided with a spline connected with a transmission shaft to transmit torque. And the tooth surface of the spline has convexity. The hub bearing has the advantages that more teeth can be meshed with one another, the service life of the teeth is prolonged, and the transmission reliability is improved. The hub bearing is mainly used for torque transmission between the hub bearing and a transmission shaft.

Description

Technical Field

[0001] This invention belongs to the field of machining technology and relates to a device for transmitting torque by connecting a wheel hub bearing and a drive shaft, specifically a spline on the end face of a wheel hub bearing. Background Technology

[0002] The closest technology is a shaft collar with face teeth for driveable wheel hubs. This technology uses face teeth to mesh for transmission, but due to errors in the machining of the face teeth, only a few teeth may contact each other during meshing, while most teeth may not make contact due to machining errors. As a result, only a few teeth are active during rotation, which shortens the lifespan of the teeth and reduces the reliability of the transmission. Summary of the Invention

[0003] The purpose of this invention is to provide a wheel hub bearing end face spline to solve the problem that when the two teeth mesh, only a few teeth are active due to machining errors in traditional end face splines, resulting in short tooth life and loosening of the locking nut that locks the two teeth in mesh.

[0004] The technical solution of the present invention is: a spline on the end face of a wheel hub bearing, comprising a wheel hub bearing end face, characterized in that: the end face of the wheel hub bearing is provided with a spline for transmitting torque by connecting to a drive shaft; the tooth surface of the spline has a convexity.

[0005] In the technical solution of this invention, the spline tooth surface is composed of sequentially connected R... 顶 Surface with R-shaped protrusion and R 底 constitute.

[0006] In the technical solution of the present invention, the spline teeth with convex surfaces undergo elastic deformation under tensile force, allowing more teeth to mesh with each other.

[0007] The spline with raised R-shaped tooth surfaces described in the technical solution of this invention is prone to elastic deformation under tensile force, allowing more teeth to mesh with each other, thus solving the problem of fewer meshing teeth caused by low machining accuracy of end face splines.

[0008] In the technical solution of the present invention, the pitch width of the tooth between the spherical surfaces of the protruding surface of R is S = S0 - 2Δ, S0 = D*sin(90° / Z), Δ = δ / COS(γ / 2), where D is the design diameter, Z is the number of teeth, δ is the single-sided protrusion amount, and γ is the angle between the imaginary planes, i.e., the surface angle.

[0009] The adjacent two R in the technical solution of the present invention 底 The tooth depth H of the spherical surface at the intersection of the imaginary tooth root and the imaginary pitch surface is given by H = S / 2 / tan(γ / 2), where γ is the depth of two adjacent R... 底The angle between imaginary planes is called the surface angle.

[0010] The imaginary tooth root intersection point in the technical solution of the present invention forms a raised surface with an radius (R) by intersecting the imaginary pitch surface and the imaginary tooth tip.

[0011] In the technical solution of the present invention, the convexity of the raised surface with R is between 0.005 and 0.02.

[0012] This invention relates to a spline on the end face of a wheel hub bearing. Because the spline on the end face of the wheel hub bearing is connected to the drive shaft to transmit torque, the straight tooth surface of the existing spline is changed to an R-shaped tooth surface, thus forming a certain convexity. The tooth surface is a spherical surface with an R-shaped convexity, forming a meshing transmission with the drive shaft similar to that of end face teeth. In this way, the mutually convex tooth surfaces undergo elastic deformation under tensile force, allowing more teeth to mesh with each other. This overcomes the shortcomings of traditional end face splines, where only a few teeth are active during meshing due to machining errors, resulting in short tooth life and loosening of the nut used to lock the meshing of two teeth.

[0013] This invention features the ability to allow more teeth to mesh together, extend the service life of the teeth, and improve transmission reliability. It is mainly used for torque transmission between wheel hub bearings and drive shafts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention used for meshing connection with a wheel hub.

[0015] Figure 2 yes Figure 1 Enlarged view of the CC section of the spline tooth surface at the middle end face.

[0016] Figure 3 yes Figure 2 Enlarged view of part E in the image.

[0017] Reference numerals: 1-Design diameter; 2-R 底 ;3-R 顶 ; 4-R-convex profile; 5-Imaginary tooth root intersection; 6-Imaginary pitch surface; 7-Imaginary tooth tip intersection; S-tooth width; S0-tooth width when flat tooth profile; δ-single-sided convexity. Detailed Implementation

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] like Figures 1 to 3 As shown in the attached figure. One embodiment of the spline on the end face of a wheel hub bearing according to the present invention includes a wheel hub bearing end face, wherein the end face of the wheel hub bearing is provided with a spline for transmitting torque via a drive shaft. The tooth surface of the spline is a profile with an radius (R), as shown in the attached figure. Figure 2 , consisting of R connected in sequence 底 3. Tooth surface and R顶 2. Composition.

[0020] Among them, the tooth surface is a raised surface 4 with an R. This R extends from the pitch point to R. 顶 2 and R 底 The formation of 3 creates a bulge, which we call convexity, and the convexity is between 0.005 and 0.02.

[0021] The pitch face tooth width of the imaginary pitch face 6 between two adjacent raised surfaces 4 with R is S = S0 - 2Δ, where S0 = D*sin(90° / Z), Δ = δ / COS(γ / 2), where S0 is the tooth width when the tooth profile is flat, D is the design diameter I, Z is the number of teeth, δ is the single-sided convexity, which can be called convexity here, and γ is the angle between the imaginary planes, i.e., the profile angle. 底 The height H of the spherical surface of tooth 2 at the imaginary tooth root intersection point 5 and the imaginary pitch surface 6 is H = S / 2 / tan(γ / 2), where γ is the height of the spherical surface of tooth 2 at the imaginary tooth root intersection point 5 and the imaginary pitch surface 6. Figure 3 The included angle when the hypothetical plane tooth is shown is the profile angle.

[0022] The convex surfaces of the splines undergo elastic deformation under tension, allowing more teeth to mesh together.

[0023] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, such as changing the shape or material of the pressure plate or retaining ring, or changing the type of bearing, etc. Such changes all fall within the protection scope of the present invention.

Claims

1. A spline on the end face of a wheel hub bearing, comprising the end face of the wheel hub bearing, characterized in that: The end face of the hub bearing is provided with a spline that connects to the drive shaft to transmit torque; the tooth surface has a convexity.

2. The spline on the end face of the hub bearing according to claim 1, characterized in that: The spline teeth are composed of sequentially connected R... 顶 (3), the raised surface with R (4) and R 底 (2) Composition.

3. The hub bearing end face spline according to claim 2, characterized in that: The spline teeth, which have convex surfaces, undergo elastic deformation under tensile force, allowing more teeth to mesh together.

4. The hub bearing end face spline according to claim 3, characterized in that: The pitch width between the spherical surfaces of the protruding surface (4) with R is S=S0-2Δ, S0=D*sin(90° / Z), Δ=δ / COS(γ / 2), where D is the design diameter (1), Z is the number of teeth, δ is the amount of protrusion on one side, and γ is the angle between the imaginary planes, i.e., the surface angle.

5. The hub bearing end face spline according to claim 4, characterized in that: The two adjacent R 底 The tooth depth H of the spherical surface of (2) at the imaginary tooth root intersection (5) and the imaginary pitch surface (6) is S / 2 / tan(γ / 2).

6. The spline on the end face of the hub bearing according to claim 5, characterized in that: The imaginary tooth root intersection (5) passes through the raised surface (4) with R formed by the imaginary pitch surface (6) and the imaginary tooth tip intersection (7).

7. The raised surface according to claim 6, characterized in that: The convexity of the raised surface (4) with R is between 0.005 and 0.02.

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