Bearing device for wheel

A bearing device and wheel technology, applied to bearings, axles, wheels, etc., can solve the problems of large number of parts, poor parts management, poor workability, etc., and achieve the effect of stabilizing torque, improving strength, and suppressing looseness

Inactive Publication Date: 2013-03-20
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a screw fastening operation during assembly, and workability is poor, and the number of parts is large, and parts management is also poor.

Method used

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  • Bearing device for wheel
  • Bearing device for wheel
  • Bearing device for wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0226] A male spline with a modulus of 0.48 and a number of teeth of 58 is formed on the shaft portion 12, and the press-fit load is measured when the cross angle θ1 is changed, where the cross angle θ1 is defined as the distance between the end surface 35a and the axis of the convex portion 35 at the start of press-fit. angle formed. In addition, the formability of the concave-convex fitting structure M when the intersection angle θ1 was changed was also evaluated. Figure 37 The measurement results of press-fit load are shown in , Figure 41 The evaluation results of formability are shown.

[0227] Depend on Figure 37 It can be seen that when the intersection angle θ is smaller than 50°, the press-fitting load increases. In addition, when the intersection angle θ is larger than 110°, the spline end surface is likely to be chipped, and when the chip is formed, the formability of the concave-convex fitting structure M deteriorates sharply, and the press-fitting load increa...

Embodiment 2

[0230] A male spline 41 having a modulus of 0.48 and a number of teeth of 59 was formed on the shaft portion 12, and Δd / 2h was varied to measure the press-fit load. Furthermore, a torsional strength test was performed on each of the concave-convex fitting structures, and the formability of the concave-convex fitting structure M was evaluated. Figure 38 The measurement results of press-fit load are shown in , Figure 39 shows the evaluation results of the torsional strength test, Figure 42 The evaluation results of the formability of the concave-convex fitting structure are shown in .

[0231] Depend on Figure 38 and Figure 39 It can be seen that when Δd / 2h exceeds 0.86, the press-fitting load increases rapidly and the torsional strength decreases. In addition, when Δd / 2h is 0.3 or less, the torsional strength decreases. Therefore, it is preferable that 0.3 Figure 42 It can be seen that the formability of the concave-convex fitting structure M is good when Δd / 2h is in ...

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Abstract

Provided is a bearing device for a wheel capable of suppressing radial play and allowing firm and easy connection between a hub and an outer ring of a constant velocity universal joint. Axially extending projections (35) are provided on a shaft portion (12) of a joint outer ring (5), and the shaft portion (12) is press-fitted into a hole (22) of a hub (1). Through this press-fitting, recesses (36) held in close fit-engagement with the projections (35) are formed by the projections (35) in an inner diameter surface of the hub (1), forming a recess / projection fit-engagement structure (M) in which the projections (35) and the recesses (36) are held in close contact with each other over an entire fit-engagement region thereof. A press-fitting margin (”d) of the projections (35) with respect to the hub (1) and a height (h) of the projections are set to the following range: 0.3 < ”d / 2h < 0.86.

Description

technical field [0001] The present invention relates to a wheel bearing device for rotatably supporting a wheel with respect to a vehicle body in a vehicle such as an automobile. Background technique [0002] In wheel bearing devices, the first-generation structure, which is called the combination of multiple rows of rolling bearings, has evolved to the second-generation structure, in which the body mounting flange is integrally provided on the outer member, and has been further developed. The third generation of rolling bearings in which one of the two inner raceway surfaces is formed on the outer circumference of the hub ring, and further, a multi-row rolling bearing in which one of the two inner raceway surfaces is formed on the outer circumference of the hub ring and the other is developed The fourth-generation wheel bearing device is formed on the outer circumference of the outer joint member of the constant velocity universal joint. [0003] For example, Patent Docume...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C35/063B60B35/14B60B35/18F16C33/58F16D3/20
CPCF16C19/186B21D53/10B60B27/0084F16C19/184F16C35/063F16D2001/103F16C35/0635B60B27/0094F16D1/072F16C2326/02B60B27/0005B60B27/0078F16D1/108B60B27/0042B60B27/0026F16D2003/22326Y10T29/49535B60B35/14B60B35/18F16C33/58
Inventor 中川亮浅野祐一小泽仁博黑田正幸
Owner NTN CORP
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