JPH0540020U - Center bearing support - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding the center bearing support that fits the outer race 6 of the bearing 5 on the inner circumference side of the inner ring 1, the rotation resistance of the bearing 5 is excessive even if there is a dimensional error in the inner ring 1. Also, make sure that no abnormal noise is generated. [Structure] The outer race 6 of a bearing 5 is held on the inner peripheral side of the inner ring 1 via a spring steel 9, and when the inner diameter of the inner ring 1 is smaller than a design value, this dimensional error causes elastic deformation of the spring steel 9. To prevent an excessive amount of tightening load from reaching the outer race 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a center bearing support. The center bearing support of the present invention is attached to, for example, a drive system of an automobile to rotatably and elastically support a rotating shaft such as a propeller shaft or an axle shaft.

[0002]

[Prior Art]

 In this type of center bearing support, a metal outer ring is arranged on the outer peripheral side of a metal inner ring, and the inner ring and outer ring are connected via a bellows-shaped rubber spring member. Bearings are fitted on the circumferential side, the outer ring is fixed to the vehicle body of the automobile, and the rotary shaft is inserted further inside the bearing to rotatably and elastically support the rotary shaft. The bearing is a ball bearing or a roller bearing and has a metal outer race fitted to the inner ring.

[0003]

[Problems to be solved by the device]

 In the conventional center bearing support, the outer race of the bearing is directly fitted to the inner circumference side of the inner ring, and the inner ring holds the outer race with a predetermined tightening load. Therefore, there are the following problems. That is, if there is a dimensional error in the part where the outer race of the inner ring is fitted (hereinafter referred to as the fitting part), the tightening load will vary, and if the fitting part is too small and the tightening load is too large. Due to this tightening load, the outer race shrinks and deforms, and the clearance between the outer race and the ball or roller (hereinafter simply referred to as the ball) deviates from the proper value and becomes too small, resulting in excessive rotation resistance or rotation. Abnormal noise occurs.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, a bear ring is formed on the inner peripheral side of the inner ring via spring steel. It provides a center bearing support that retains the outer race of.

[0005]

[Action]

 Spring steel has elasticity (spring force) in the radial direction, and this elasticity is used to hold the bearing outer race. If there is a dimensional error in the inner ring, this dimensional error is absorbed by the elasticity of the steel panel.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a metal outer ring 2 is arranged on the outer peripheral side of a metal inner ring 1, and a bellow-shaped rubber spring member 3 integrally connects both rings 1, 2. Connected. A bearing 5 is held on the inner peripheral side of the fitting portion 4 of the inner ring 1 via a spring steel 9, and the bearing 5 includes a metal outer race 6, an inner race 7 and a large number of balls 8. The outer diameter of the outer race 6 is set to be smaller than the inner diameter of the fitting portion 4, and between the fitting portion 4 and the outer race 6, elasticity is provided in the radial direction as shown in FIG. 2 or 3. The spring steel 9 is interposed. The spring steel 9 is basically annular, but it may have a cut portion at one location on the circumference or may be divided in the circumferential direction. However, according to the center bearing support having the above-described structure, since the outer race 6 of the bearing 5 is held by utilizing the elasticity of the spring steel 9, there is a dimensional error in the fitting portion 4 of the inner ring 1. This dimensional error can also be absorbed by the elasticity of the spring steel 9. That is, when the inner diameter of the fitting portion 4 of the inner ring 1 is smaller than the design value, this dimensional error is absorbed by the elastic deformation of the spring steel 9 and the excessive tightening load does not reach the outer race 6, or at least This makes it possible to prevent the outer race 6 from being reduced in diameter and deformed to cause excessive rotation resistance or abnormal rotation noise.

As shown in FIG. 2 or 3, the spring steel 9 has a corrugated shape, and the spring steel 9 absorbs the dimensional error of the fitting portion 4 within a range until the corrugation becomes flat. Therefore, the size of the corrugation is determined so that the maximum dimensional error expected can be absorbed as a guide.

[0009]

[Effect of the device]

 The present invention has the following effects. That is, since the outer ring of the bearing is held on the inner peripheral side of the inner ring via the spring steel, even if there is a dimensional error in the inner ring, this dimensional error can be absorbed by the elasticity of the spring steel. .. That is, when the inner diameter of the inner ring is smaller than the design value, this dimensional error is absorbed by the elastic deformation of the spring steel so that the excessive tightening load does not reach the outer race or is difficult to reach. , It is possible to prevent the outer race from being reduced in diameter and deformed so that the rotation resistance becomes excessive and the abnormal rotation noise is generated.

[Brief description of drawings]

FIG. 1 is a half cutaway view of a center bearing support according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of a partially cut spring steel.

FIG. 3 is a partially cutaway perspective view showing another example of spring steel.

[Explanation of symbols] 1 inner ring 2 outer ring 3 spring member 4 fitting part 5 bearing 6 outer race 7 inner race 8 ball 9 spring steel

Claims (1)

[Scope of utility model registration request] 1. A center bearing support, wherein an outer race 6 of a bearing 5 is held on the inner peripheral side of an inner ring 1 via a spring steel 9.