CN218266876U - End face tooth part arranged on outer shell and capable of driving hub - Google Patents

Abstract

The utility model discloses an end face tooth part arranged on a bell-shaped shell and capable of driving a wheel hub, which comprises a plurality of identical teeth and tooth grooves arranged on an inwards concave conical surface; the bottom of each tooth socket groove is a plane, and the connecting part of the two tooth flank surfaces and the bottom of the tooth socket groove is a transitional arc with the radius of R2; the extension lines of the tooth tip structure lines and the extension lines of the two tooth bottom structure lines intersect at one point of the rotation axis or the intersection point does not cross the rotation axis; a straight line formed by the highest point of the circular arc tooth top, namely an tooth top line, and a straight line formed by the middle point of the tooth socket, namely a tooth root line, are not intersected; the angle between the two flanks of a tooth is a flank angle which remains constant over the radial range. Set up the utility model discloses an axial dimensions shortens greatly to the bell shell, light in weight need not quench, and the stress surface is big, and transmission stability is good, bears big moment of torsion reinforce, and the wearability is strong, has from the centering function, has avoided beating of rotatory production, and the noise is low, is fit for higher rotational speed, the occasion of more high-power rotation connection is used.

Description

End face tooth part arranged on bell shell and capable of driving hub

Technical Field

The utility model belongs to the technical field of the vehicle semi-axis is made, a can drive end face tooth portion of wheel hub's setting on bell shell is related to.

Background

The traditional bell shell is connected with a hub in a mode that a handle part connected with the hub is provided with an external spline and a thread, and drives the hub to run. The external splines are standard involute splines, and have a risk of breaking in the process of transmitting torque, especially under the condition of large torque and rapid starting, so that the external splines are not suitable for the requirement of a vehicle on smaller and smaller turning diameter. And because the design of outer spline of the outer handle of the outer shell has the condition that the delayed tensile test is unqualified, the problem of delayed cracks at the R angle position caused by uneven matching of the end surfaces of the hub bearing and the outer ring bearing can occur mainly because the R angle of the handle is quenched too deeply or the wall thickness at the R angle position is too thin. And the design of the external spline of the handle part leads the bell-shaped shell to be longer as a whole, larger in volume and heavier in weight, so that the bell-shaped shell is not suitable for the requirements of automobiles on light weight at the present stage with higher and higher requirements on the driving performance and the fuel economy performance of the automobiles. Therefore, there is a need to develop a bell-shaped shell which does not need quenching, has a relatively simple manufacturing process, is light in weight and has a short handle to adapt to the development of the automobile industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above-mentioned problem that exists among the prior art, a can drive wheel hub's the terminal surface tooth portion of setting on the bell shell is provided, the bell shell that sets up this terminal surface tooth portion shortens axial dimensions greatly, light in weight, need not quench, the stress surface is big, transmission stability is good, it is strong to bear big torsional force, wear resistance is strong, have from the centering function, the beating of rotatory production has been avoided, the noise is low, be fit for higher rotational speed, the occasion that more high-power rotation is connected is used.

In order to achieve the above object, the technical solution of the present invention is: a facing toothing provided on an outer bell for driving a wheel hub, said facing toothing being located on an internal concave conical surface at the root of the shank of the outer bell, comprising a plurality of identical teeth and tooth spaces provided on an internal concave conical surface whose central axis coincides with the axis of rotation, which can mesh without play into a corresponding toothing provided on the wheel hub; the bottom of each tooth socket groove is a plane, and the connecting part of the two tooth flank surfaces meshed without gaps and the bottom of the tooth socket groove is a transition arc with the radius of R2; the tooth tip structure line is a straight line of two sides of one tooth, the tooth bottom structure line is a straight line of two sides of two adjacent teeth, and the extension line of the tooth tip structure line and the extension lines of the two tooth bottom structure lines on two sides of the tooth tip structure line intersect at one point of the rotation axis or the intersection point does not cross the rotation axis; the tooth top line is a straight line formed by the highest point of the circular arc tooth top, the tooth bottom line is a straight line formed by the middle point of the tooth socket, and the tooth top line and the tooth bottom line are not intersected; the angle between the two flanks of a tooth is a flank angle which remains constant over the radial extent.

Further preferably, the tooth top of each tooth is an outward protruding arc surface with a radius R1. Preferably, the radius R1 is greater than the radius R2.

Further preferably, the flank angle is 45 ° to 65 °, most preferably 55 °.

The utility model discloses because end face tooth portion surface area is bigger to make torque transmission bigger, have higher high torsional strength and high bending rigidity, the moment of end face tooth portion transmission is shared by a plurality of teeth, and the atress is more even, avoids stress high concentration, transmits bigger moment of torsion, and torque transmission efficiency is high. The end face tooth part is directly connected with the corresponding tooth part of the hub bearing through teeth and tooth grooves, the bottom of each tooth groove is composed of a plane and two transition arcs with the radius of R2, interference with the corresponding tooth part arranged on the hub is avoided, and equal-gap design is guaranteed; the stress surface of the end face tooth part is large, the bearing force of large torque is strong, the transmission stability is good, the self-centering function is achieved, the deflection caused by the non-centering of a rotating shaft of the connecting piece is avoided, the jumping generated by rotation is avoided, the noise is low, and the NVH performance of an automobile is effectively improved. The faying face of tooth is laminated completely, connects to wheel hub zero clearance ground and effectively improves start and the viscous friction abnormal sound of backing a car. The end face tooth part does not need quenching, does not have quenching stress, and can effectively improve the delayed stretching problem; the end face tooth part can be forged and formed, so that a plurality of working procedures can be saved by internal processing, and the cost can be saved; the handle part of the bell-shaped shell is not provided with a connecting structure, so that the axial size can be greatly shortened, the bell-shaped shell is compact and reliable, the weight is reduced, the disassembly and the assembly are convenient, and the bell-shaped shell is suitable for rotary connection of height and high power. The utility model discloses flank of tooth intensity and tooth root intensity are high, and the wearability is strong, long service life.

Drawings

Fig. 1 is a top view of the present invention;

FIG. 2 is a cross-sectional view AA in FIG. 1;

fig. 3 is a schematic top view of the present invention viewed in an oblique direction;

FIG. 4 is a cross-sectional view BB of FIG. 3;

FIG. 5 is an enlarged view of section C of FIG. 4;

fig. 6 is a schematic top view of the present invention viewed in another oblique direction;

FIG. 7 is a cross-sectional view DD of FIG. 6;

fig. 8 is an enlarged view of a portion E of fig. 7.

Detailed Description

The present invention will be further described with reference to the following embodiments.

As shown in fig. 1 to 8, the present embodiment is a face tooth part 2 provided on an outer race of a drivable hub, the face tooth part 2 being located on a concave conical surface at the root of the shank of the outer race 1, and comprising a plurality of identical teeth 3 and tooth spaces provided on a concave conical surface whose central axis coincides with the axis of rotation F, which can be engaged without clearance into a corresponding tooth part provided on the hub. The bottom of each gullet is a flat 82, and the connecting parts of the two tooth flanks meshing without gaps and the gullet bottom are transitional arcs 81 and 83 with the radius R2. The tip structure line 9 is a straight line intersecting both side surfaces of one tooth, the root structure line 4 is a straight line intersecting both side surfaces of two adjacent teeth, and an extension line of the tip structure line 9 and extensions lines of both root structure lines 4 on both sides of the tip structure line 9 intersect at a point G on the rotation axis F (the intersection point may be set so as not to cross the rotation axis F as required)

Proximal to and intersecting the axis of rotation F) in the same vertical plane. The top line 6 is a straight line formed by the highest point of the circular arc top, the root line 5 is a straight line formed by the middle point of the tooth socket, and the top line 6 and the root line 5 do not intersect. The angle between the two flanks 71 and 72 of a tooth 3 is the flank angle, which remains constant over the radial extent. Preferably, the flank angle is any of 45-65 °, most preferably 55 °. Preferably, the tooth top of each tooth is an outward protruding arc surface with a radius of R1. Preferably, the radius R1 is greater than the radius R2.

The above-described embodiments are merely preferred and exemplary and are not intended to limit the present invention, and any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (5)

1. A facing toothing provided on an outer bell for driving a wheel hub, said facing toothing being located on an internal concave conical surface at the root of the shank of the outer bell, comprising a plurality of identical teeth and tooth spaces provided on an internal concave conical surface whose central axis coincides with the axis of rotation, which can mesh without play into a corresponding toothing provided on the wheel hub; the method is characterized in that: the bottom of each tooth socket groove is a plane, and the connecting part of the two tooth flank surfaces meshed without gaps and the bottom of the tooth socket groove is a transitional arc with the radius of R2; the tooth tip structure line is a straight line of two sides of one tooth, the tooth bottom structure line is a straight line of two sides of two adjacent teeth, and the extension line of the tooth tip structure line and the extension lines of the two tooth bottom structure lines on two sides of the tooth tip structure line intersect at one point of the rotation axis or the intersection point does not cross the rotation axis; the tooth top line is a straight line formed by the highest point of the circular arc tooth top, the tooth bottom line is a straight line formed by the middle point of the tooth socket, and the tooth top line and the tooth bottom line are not intersected; the angle between the two flanks of a tooth is a flank angle which remains constant over the radial extent.

2. The end face teeth of a drivable hub as set forth in claim 1 provided on an outer shell, characterized in that: the tooth top of each tooth is an outward convex arc surface with the radius of R1.

3. The facing teeth of a drivable hub as set forth in claim 2 disposed on an outer race, wherein: the radius R1 is greater than the radius R2.

4. The end face teeth of a drivable hub as set forth in claim 1 or 2, provided on an outer shell, characterized in that: the flank angle is between 45 and 65.

5. The facing teeth of a drivable hub as set forth in claim 4 on an outer race, wherein: the flank angle is 55 °.

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