JPH0589954U - Shell type roller bearing - Google Patents

Abstract

(57) [Abstract] [Purpose] In a shell type roller bearing having a notch for introducing lubricating oil in the outer ring, prevents the housing from being cut at the notched edge portion of the outer ring during press fitting. [Structure] The outer ring 1 is a cylindrical shell type with a bottom made of a deep drawn product of a steel plate, and a roller 3 held by a cage 2
Is assembled in the outer ring 1. A notch 4 for introducing lubricating oil is provided at the open end of the peripheral wall 1c of the outer ring 1. A chamfer 4a is provided on the peripheral edge of the notch 4 on the outer diameter surface side of the outer ring. The chamfered portion 4a is processed as follows.
The pressing may be performed by surface pressing, or may be performed by tumbling or cutting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a notched shell type roller bearing used for automobile transmissions and various other industrial machines.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as a roller bearing used for an automobile transmission or the like, there has been proposed a cylindrical shell type with an outer ring having a bottom and a notch for introducing lubricating oil provided at an opening end of a peripheral wall of the outer ring. According to this, the lubricating oil that is agitated in the housing of the transmission as the shaft is driven enters into the bearing through the notch and is used for lubricating the bearing.

[0003]

[Problems to be solved by the device]

 The shell-type outer ring is formed by deep-drawing a thin-walled steel plate.In general, it does not have roundness as a single unit, and is fixed to the housing by strong press fitting to follow the bearing mounting hole of the housing. Roundness is achieved. However, in order to perform strong press-fitting in this way, if a notch is machined in the outer ring, the inner surface of the housing will be cut by the sharp edge of the notch periphery during press-fitting, and the cutting debris will be inside the bearing and around the gear. May invade and cause obstacles.

The outer ring is made of a steel plate as described above, whereas the housing is often made of an aluminum alloy in order to reduce the weight and the like, and even if it is made of iron, it is not heat-treated, and therefore the hardness is high. Due to the difference, the above cutting problem is likely to occur. Further, the notch of the outer ring is generally formed by punching, but there is a case where the edge portion is bent, which also causes the above-mentioned cutting problem. For this reason, the press-fitting work needs attention and the work is troublesome.

An object of the present invention is to provide a shell type roller bearing in which the housing is not cut at the notched edge portion of the outer ring during press fitting.

[0006]

[Means for Solving the Problems]

 This invention is a shell type roller bearing in which an outer ring is formed in a cylindrical shape with a bottom and has a notch at an opening end of an outer ring peripheral wall, and a chamfered portion is provided on a peripheral edge of an outer ring outer diameter surface of the notch.

[0007]

[Action]

 In use, the notch of the outer ring is used to introduce lubricating oil into the bearing. When this bearing is press-fitted into the housing, there is no risk of cutting the inner surface of the housing because the peripheral edge of the notch in the outer ring peripheral wall is provided with a chamfer and there is no sharp edge.

[0008]

【Example】

 An embodiment of this invention will be described with reference to FIG. The outer ring 1 is a cylindrical shell type with a bottom made of a deep drawn product of a steel plate, and the rollers 3 held by a cage 2 are incorporated in the outer ring 1. The roller 3 is directly in rolling contact with a shaft (not shown) so that the inner ring is omitted. A step portion 1b which is in contact with the end surface of the roller 3 is provided on the peripheral edge of the bottom 1a of the outer ring 1, and a notch 4 having a U-shaped planar shape is provided at the opening end of the peripheral wall 1c.

A chamfered portion 4 a is provided on the peripheral edge of the notch 4 on the outer diameter surface side of the outer ring. The chamfered portion 4a may be processed into an inclined flat surface or a curved surface. The chamfered portion 4a is processed by crushing by pressing (so-called pressing), tumbling or cutting. The notch 4 is formed by punching with a press or the like. In this case, punching is performed from the inner diameter side to the outer diameter side so that the punching return portion does not project to the inner diameter surface that is the rolling surface of the outer ring 1. Therefore, a return portion is formed at the peripheral edge of the outer peripheral surface of the outer ring of the notch 4, but this return portion is removed by the processing of the chamfered portion 4a.

FIG. 2 shows a part of an automobile transmission using the shell type roller bearing 10. A drive shaft 12 and a counter shaft 13 are arranged in parallel in the housing 11, and a main drive gear 14, a counter drive gear 15, a synchronizing mechanism 16, and other various gears are attached to each of them.

The shell-type roller bearing 10 is fixed by press fitting into a bearing mounting hole 17 provided in the front wall portion 11 a of the housing 11 and supports the shaft end of the counter shaft 13. The drive shaft 12 is supported by a deep groove ball bearing 19 installed in another bearing mounting hole 18 of the housing 11.

In the wall portion 11b between the bearings 10 and 19 on the front wall 11a of the housing 11, a lubricating oil introduction groove 20 that opens from the inner surface to the inner diameter surface of the shell type roller bearing mounting hole 17 is formed. The roller bearing 10 is mounted so that the notch 4 of the outer ring 1 thereof is aligned with the lubricating oil introduction groove 20.

The operation of the above configuration will be described. In the example of FIG. 2, the rotation of the drive shaft 12 causes a stirring flow of the lubricating oil in the housing 11 as indicated by an arrow a. The lubricating oil thus flowing flows into the bearing from the lubricating oil introduction groove 20 of the housing 11 through the notch 4 of the outer ring 1 of the shell type roller bearing 10, and lubricates the rolling surface. Therefore, the shell type roller bearing 10 can be used without replenishment of lubricating oil.

When the shell-type roller bearing 10 is press-fitted into the housing 11 during assembly, the shell-type roller bearing 10 is press-fitted from the opening end side as indicated by an arrow b in FIG. 1 (B). At this time, since the chamfered portion 4a is provided at the peripheral edge of the outer ring outer diameter surface of the notch 4 of the outer ring 1 and there is no sharp edge portion, the inner diameter surface of the bearing mounting hole 17 of the housing 11 is cut. There is no fear of twisting. Therefore, the press-fitting work does not require attention, the work is easy, and the cutting debris does not hinder the bearing 10 or the peripheral gear 16 or the like.

Although the above embodiment has been described with respect to the case of being applied to the cylindrical roller bearing of the shell type outer ring, the present invention can also be applied to the needle roller bearing of the shell type outer ring.

[0016]

[Effect of the device]

 In the shell type roller bearing of the present invention, the chamfered portion is provided on the peripheral edge of the notch of the outer ring peripheral wall, and the sharp edge portion is eliminated, so that there is no fear of cutting the inner surface of the housing during press fitting. Therefore, while using a shell-type outer ring with a notch, the work is easier because the press-fitting work does not require attention, and cutting debris may interfere with the bearings and the surrounding gears. Disappear.

[Brief description of drawings]

FIG. 1A is a partial sectional view of a shell type roller bearing according to an embodiment of the present invention, and FIG. 1B is a sectional view of B in FIG. 1A.
An enlarged cross-sectional view of the portion, (C) is an enlarged plan view of a notch in the bearing.

FIG. 2 is a partially cutaway side view of a transmission using the bearing.

[Explanation of symbols]

1 ... Outer ring, 1c ... Peripheral wall, 3 ... Rolling element, 4 ... Notch, 4a ...
Chamfer

Claims (1)

[Scope of utility model registration request] 1. A shell type roller bearing having an outer ring formed in a cylindrical shape with a bottom and having a notch at an opening end of an outer ring peripheral wall, wherein a chamfered portion is provided on a peripheral edge of an outer ring outer diameter surface of the notch. And shell type roller bearing.